ADCP-80-323
DS3 Digital Signal Cross-Connect
(DSX-3) System
Application Guide
Description
System Design
Installation
Operation
Maintenance
Worksheets
General Information
4-26015-0083
ADCP-80-323
1st Edition, Issue 2, December 1996
DS3 Digital Signal Cross-Connect
(DSX-3) System
Application Guide
Description
System Design
Installation
Operation
Maintenance
Worksheets
General Information
4-26015-0083
ADCP-80-323
1st Edition, Issue 2, December 1996
© 1993, 1996, ADC Telecommunications, Inc.
All Rights Reserved
Printed in U.S.A.
ADC Telecommunications, Inc.
4900 West 78th Street, Minneapolis, Minnesota 55435
In U.S.A. and Canada 1-800-366-3891
Outside U.S.A. and Canada: (612) 946-3000
Fax: (612) 946-3293
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no
event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of
liability applies to all products, publications and services during and after the warranty period.
This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891, extension 3475
(in U.S.A. or Canada) or 612-946-3475 (outside U.S.A. and Canada), or by writing to ADC Telecommunications, Inc., Attn:
Technical Assistance Center, Mail Station #77, 4900 West 78th Street, Minneapolis, MN 55435, U.S.A.
Page ii
ADCP-80-323
1st Edition, Issue 2, December 1996
ABOUT THIS MANUAL
This Applications Guide is provided upon request to any telephone office contemplating
installation of an ADC DS3 Digital Signal Cross-Connect (DSX-3) System. The Applications
Guide describes the DSX-3 System and its uses, and gives specific instructions and worksheets
for telephone office personnel to design and purchase a DSX-3 System unique to their particular
needs. Instructions are also provided for assembly, installing and maintaining, the DSX-3
System. Full descriptions of DSX-3 bays, panels, modules, chassis, support hardware, and
accessories are provided in ADC’s DSX Catalog.
REVISION HISTORY
EDITION/ISSUE
DATE
REASON FOR CHANGE
1st Edition, Issue 1
4/93
Original
1st Edition, Issue 2
12/96
Update to current format.
LIST OF CHANGES
PAGE
IDENTIFIER
All
DESCRIPTION OF CHANGE
1st Edition, Issue 2
RELATED MANUALS
Listed below are all of the related manuals and their publication numbers. Copies of these
publications can be ordered by contacting the ADC Technical Assistance Center.
Title
DSX-3 Digital Signal Cross-Connect Catalog
ADCP Number
231
Page iii
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
ADMONISHMENTS
Important safety admonishments are used throughout this manual to warn of possible hazards to
persons or equipment. An admonishment identifies a possible hazard and then explains what may
happen if the hazard is not avoided. The admonishments — in the form of Dangers, Warnings,
and Cautions — must be followed at all times. These warnings are flagged by use of the
triangular safety icon (seen below), and are listed in descending order of severity of injury or
damage and likelihood of occurrence.
Danger: Danger is used to indicate the presence of a hazard that will cause severe
personal injury, death, or substantial property damage if the hazard is not avoided.
Warning: Warning is used to indicate the presence of a hazard that can cause severe
personal injury, death, or substantial property damage if the hazard is not avoided.
Caution: Caution is used to indicate the presence of a hazard that will or can cause
minor personal injury or property damage if the hazard is not avoided.
Page iv
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
1
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5907-C
TYPICAL DSX-3 BAY
Page v
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
Page vi
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
TABLE OF CONTENTS
Content
Page
SECTION 1
DESCRIPTION
1. GENERAL ........................................................................... 1-1
2. FUNCTIONAL DESCRIPTION ............................................................ 1-2
A.
Testing and Fault Isolation........................................................... 1-4
B.
Interoffice Communication........................................................... 1-5
C.
Traffic Pattern Changes ............................................................. 1-5
D.
Inventory and Installation Costs ...................................................... 1-5
E.
Office Layout ..................................................................... 1-5
F.
Office Record Keeping .............................................................. 1-5
3. SYSTEM COMPONENTS................................................................ 1-5
A.
Drop-In Bays ..................................................................... 1-6
B.
DSX-3 Chassis .................................................................... 1-6
C.
DSX-3 Panels .................................................................... 1-10
D.
DSX-3 Plug-In Cross-Connect (PIX-DSX-3) Chassis....................................... 1-10
E.
Interbay Patch Panels ............................................................. 1-12
F.
Cross-Aisle Panels ................................................................ 1-12
G.
Repeaters ....................................................................... 1-14
H.
Equipment Racks ................................................................. 1-16
I.
Cable Routing Hardware ........................................................... 1-18
J.
Communications Panels ........................................................... 1-18
K.
Fuse Panels ..................................................................... 1-19
L.
Accessories ..................................................................... 1-19
SECTION 2
SYSTEM DESIGN
1. GENERAL ........................................................................... 2-1
2. INITIAL CONSIDERATIONS ............................................................. 2-2
A.
Floor Space ...................................................................... 2-2
B.
Circuit and Cable Densities .......................................................... 2-4
C.
Cross-Connect Wireways ............................................................ 2-4
D.
Extension of an Existing Lineup ...................................................... 2-5
3. DESIGNING THE SYSTEM .............................................................. 2-5
A.
DSX Interface ..................................................................... 2-5
B.
Chassis/Panel and Bay Selection...................................................... 2-6
C.
Cross Aisle Panels ................................................................. 2-8
D.
Intraoffice Repeaters ............................................................... 2-9
E.
Maintenance Panels ............................................................... 2-11
F.
DSX Bays ....................................................................... 2-11
(continued)
Page vii
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
TABLE OF CONTENTS
Content
Page
SECTION 2
SYSTEM DESIGN
(continued)
G.
DSX-3 Skeleton Bays.............................................................. 2-14
H.
Bay Spacer/Filler Panels ........................................................... 2-14
I.
Equipment Cabling ............................................................... 2-15
J.
Cross-Connect Cabling ............................................................ 2-21
K.
Assignment of Network Elements .................................................... 2-24
L.
Final System Design .............................................................. 2-25
SECTION 3
INSTALLATION
1. GENERAL .......................................................................... 3-1
2. OFFICE REQUIREMENTS .............................................................. 3-1
A.
Space and Floor Loading ........................................................... 3-1
B.
Environment ..................................................................... 3-3
3. UNPACKING AND INSPECTION.......................................................... 3-4
4. HARDWARE INSTALLATION ............................................................ 3-4
A.
Bay Positioning and Mounting ....................................................... 3-4
B.
Chassis, Module and Panel Positioning and Mounting..................................... 3-4
5. SYSTEM WIRING AND CABLING ......................................................... 3-5
A.
Power Wiring..................................................................... 3-5
B.
Fuse Panels...................................................................... 3-5
C.
DSX Chassis, Modules and Panels .................................................... 3-5
D.
Cabling and Cross-Connect Wiring.................................................... 3-7
E.
Cross-Aisle Panel Cabling .......................................................... 3-9
F.
Interbay Patch Panel Cabling ....................................................... 3-11
G.
Cross-Connect Cabling ............................................................ 3-11
SECTION 4
OPERATION
1.
GENERAL .......................................................................... 4-1
PROCEDURE 1: CROSS-CONNECT CIRCUIT IDENTIFICATION ................................. 4-2
PROCEDURE 2: DIGITAL OFFICE EQUIPMENT TEST ......................................... 4-3
PROCEDURE 3: IN-SERVICE PATCHING TO BYPASS A FAILED FACILITY ......................... 4-4
PROCEDURE 4: IN-SERVICE ROLL OVER TO NEW FACILITY .................................. 4-6
PROCEDURE 5: OUT- OF-SERVICE PATCHING TO BYPASS A FAILED FACILITY .................... 4-8
PROCEDURE 6: OUT- OF-SERVICE TRAFFIC PATTERN CHANGES .............................. 4-9
PROCEDURE 7: RESTORATION OF SERVICE VIA INTERMEDIATE SITE ......................... 4-10
PROCEDURE 8: INTERBAY PATCHING BY MEANS OF SHORT PATCH CORDS .................... 4-11
(continued)
Page viii
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
TABLE OF CONTENTS
Content
Page
SECTION 5
MAINTENANCE
1. GENERAL ........................................................................... 5-1
2. PREVENTIVE MAINTENANCE ........................................................... 5-1
3. CORRECTIVE MAINTENANCE ........................................................... 5-1
A.
Troubleshooting................................................................... 5-1
B.
Tracer Lamp Replacement ........................................................... 5-2
C.
Fuse Replacement ................................................................. 5-2
D.
Module Replalcement............................................................... 5-2
SECTION 6
WORKSHEETS
WORKSHEET 1 .......................................................................... 6-2
WORKSHEET 2 .......................................................................... 6-3
WORKSHEET 3 .......................................................................... 6-4
WORKSHEET 4 .......................................................................... 6-5
WORKSHEET 5 .......................................................................... 6-6
WORKSHEET 6 .......................................................................... 6-7
SECTION 7
GENERAL INFORMATION
1. WARRANTY/SOFTWARE ............................................................... 7-1
2. SOFTWARE SERVICE AGREEMENT ...................................................... 7-1
3. REPAIR/EXCHANGE POLICY ............................................................ 7-1
4. REPAIR CHARGES .................................................................... 7-2
5. REPLACEMENT/SPARE PRODUCTS ...................................................... 7-2
6. RETURNED MATERIAL................................................................. 7-2
7. SYSTEM INTEGRATION SERVICES ....................................................... 7-3
8. CUSTOMER SUPPORT SERVICES ........................................................ 7-3
Page ix
© 1996, ADC Telecommunications, Inc.
DESCRIPTION
ADCP-80-323
1st Edition, Issue 2, December 1996
SECTION 1
DESCRIPTION
Content
Page
1. GENERAL ........................................................................... 1-1
2. FUNCTIONAL DESCRIPTION ............................................................ 1-2
A.
Testing and Fault Isolation........................................................... 1-4
B.
Interoffice Communication........................................................... 1-5
C.
Traffic Pattern Changes ............................................................. 1-5
D.
Inventory and Installation Costs ...................................................... 1-5
E.
Office Layout ..................................................................... 1-5
F.
Office Record Keeping .............................................................. 1-5
3. SYSTEM COMPONENTS................................................................ 1-5
A.
Drop-In Bays ..................................................................... 1-6
B.
DSX-3 Chassis .................................................................... 1-6
C.
DSX-3 Panels .................................................................... 1-10
D.
DSX-3 Plug-In Cross-Connect (PIX-DSX-3) Chassis....................................... 1-10
E.
Interbay Patch Panels ............................................................. 1-12
F.
Cross-Aisle Panels ................................................................ 1-12
G.
Repeaters ....................................................................... 1-14
H.
Equipment Racks ................................................................. 1-16
I.
Cable Routing Hardware ........................................................... 1-18
J.
Communications Panels ........................................................... 1-18
K.
Fuse Panels ..................................................................... 1-19
L.
Accessories ..................................................................... 1-19
1. GENERAL
This section describes ADC’s DS3 Digital Signal Cross-connect (DSX-3) Systems,
1.01
which serve as centralized termination, test access, cross-connect points and distribution frames
for digital equipment/network elements (NE). Each DSX-3 System is designed to accommodate
the following digital line rates via 75 ohm coaxial connections:
•
DS3 — 44.736 Megabits per second.
•
DS-4NA — 139.264 Megabits per second.
•
STS-1 — 51.840 Megabits per second.
•
STS-3 — 155.520 Megabits per second.
All signal rates are referred to as DS3 within this guide unless specific signal rates require
unique information.
Signals from all network elements are maintained at an equal level at the DSX-3 by
1.02
means of office-provided pads and equalizers which compensate for the various cable lengths.
This allows for testing, patching, and rearranging of compatible equipment at the DSX-3 without
having to readjust signal levels.
Page 1-1
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
ADC’s DSX-3 Systems are suitable for both large and small central offices, and
1.03
customer premises, and each can be designed and configured by the user or by ADC to meet the
specific requirements of the office in which it is to be located. Systems are modular and can be
designed to handle all cross-connect requirements in an office, or to supplement existing office
cross-connect systems. DSX-3 Systems can be expanded later by simply adding more DSX
assemblies.
2. FUNCTIONAL DESCRIPTION
A DSX-3 System consists of any number of individual DSX terminations to which
2.01
network elements are connected and cross connected. Each digital DSX circuit requires two DS3
terminations as shown in Figure 1-1. Each DSX termination consists of two patch jacks, one
monitor jack, and two cross-connect terminals. The circuit is completed by cross connecting the
IN and OUT circuits, either by jumpers at the cross-connect terminals or patch cords to the jacks.
A typical DS3 circuit is shown in Figure 1-2. Cabling from the network element inputs
2.02
and outputs are connected to the DSX EQUIPMENT INPUT/OUTPUT terminals. By means of
jumpers connected between DSX CROSS-CONNECT terminals, any network element
input/output may be connected to any other network element input/output.
In Figure 1-2, network elements A and B are connected to the DSX EQUIPMENT
INPUT/OUTPUT terminals of two different DSX positions. These network elements are then
connected together at the DSX by jumpers on the CROSS-CONNECT terminals. The
2.03
corresponding tracer lamp terminals are also jumpered together. Cross-connected network
elements A and B can now be identified, monitored and tested as follows:
1.
Circuit Identification — At either end of a cross-connect, activation of the lamp switch
causes the tracer lamps at each end of the corresponding cross-connect jumper to flash
for twenty seconds and then remain lit. This gives a visual indication of the network
elements that are jumpered together.
2.
Bridged Monitoring and Testing — Monitor or test equipment patched into either of the
MONITOR jacks allows testing without interrupting the signals between the A and B
network elements.
3.
Split-circuit Testing — Test equipment patched into an IN or OUT jack splits the A-to-B
circuit for direct testing of either network element.
In addition, patch cords can be used to split cross-connected network elements and
2.04
connect either of the two elements to a third network element. In Figure 1-3 network element B
is temporarily patched to network element C.
Figure 1-3 illustrates one of the many testing and patch-around configurations possible,
2.05
all of which are established permanently or temporarily at the centrally located DSX System. As
a result, many benefits can be immediately realized in the following areas:
Note: The Operation Section of this Application Guide provides schematic diagrams and
step-by-step procedures for most of the functions performed at the DSX.
Page 1-2
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
MONITOR
JACK
MONITOR
JACK
PATCH CORD
NETWORK
ELEMENT
OUT JACK
OUT JACK
IN JACK
IN JACK
NETWORK
ELEMENT
CROSS-CONNECTS
DSX
TRANSMISSION SIGNAL DIRECTION
TERMINAL CROSS-CONNECT
JACK
SEMI -PERMANENT CROSS-CONNECT JUMPER
TERMPORARY PATCH CORD
1869-A
Figure 1-1. Single Digital DSX Circuit
-48V
-48V
TRACER
LAMP
TRACER
LAMP
GND
GND
LAMP
SWITCH
LAMP
SWITCH
MESSENGER CORD
MON
MON
X-OUT
X-OUT
X-IN
NETWORK
ELEMENT
A
OUT
IN
CROSS-CONNECTS
X-IN
OUT
OUT
IN
IN
OUT
NETWORK
ELEMENT
B
IN
1870-A
Figure 1-2. Typical DS3 Circuits Cross-Connected through the DSX
Page 1-3
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
-48V
TRACER
LAMP
TRACER
LAMP
GND
-48V
GND
LAMP
SWITCH
LAMP
SWITCH
MESSENGER CORD
MON
X-OUT
X-OUT
X-IN
NETWORK OUT
ELEMENT
A
IN
-48V
MON
CROSS-CONNECTS X-IN
OUT
OUT
IN
IN
OUT NETWORK
ELEMENT
B
IN
TRACER
LAMP
GND
LAMP
SWITCH
PATCH
CORDS
MON
X-OUT
X-IN
NETWORK
OUT
ELEMENT
C
OUT
1871-A
IN
IN
Figure 1-3. Patching DS3 Circuits through DSX
A. Testing and Fault Isolation
By terminating all digital operational and test equipment at one central point (the DSX),
2.06
overall office equipment preventive and corrective maintenance can be performed at this central
location. Identification of existing or developing problems is readily accomplished at the
DSX by:
1.
Testing at DSX jacks connected directly to network element inputs and outputs.
2.
Patching in spare equipment for suspected faulty units.
This capability results in a reduction of skilled personnel and time required for isolation
2.07
of failed or questionable equipment.
Page 1-4
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
B. Interoffice Communication
The loss of a major facility between two locations may isolate or greatly reduce
2.08
communication capability between the two sites. To temporarily restore partial communications
between these two sites, several circuits can be rerouted through a third site by simple patch
arrangements at the DSX located at the three sites. After the facility is repaired, these temporary
patches are easily removed and normal service between the two sites is restored.
C. Traffic Pattern Changes
Major changes in traffic patterns (such as those caused by a large corporation relocating
2.09
within the limits of the same office) may leave a surplus of capacity at a vacated area and a
shortage of capacity at the new location. Changes of this type are readily accomplished by
reconfiguring cross-connect jumpers at the DSX. This flexibility provided by the DSX makes
massive office rewiring unnecessary.
D. Inventory and Installation Costs
The DSX facilitates planning for future growth by allowing installation and cabling of
2.10
unequipped bays of network elements to the DSX at one time. This eliminates extensive future
changes associated with wiring of circuits as they are needed. Turning up circuits is then simply
a matter of obtaining the plug-in equipment from stock, placing it into the associated mountings
and connecting the circuit at the DSX via cross-connect jumpers. Installation costs and
equipment inventory are thereby kept to a minimum.
E. Office Layout
The DSX makes it possible to add equipment to an office without major changes in the
2.11
office layout. Equipment is simply installed where space is available and then wired to the
centralized DSX. Cross-connect jumpers on the DSX connect the network elements into the
desired circuit configuration.
F. Office Record Keeping
The DSX minimizes office record keeping by providing designation strips and cards for
2.12
labeling of connected equipment locations and cross-connects. In addition, tracer lamps are
available to readily identify different pieces of equipment cross connected at the DSX.
3. SYSTEM COMPONENTS
DSX circuits are available in various bay configurations. The DSX bays may also be
3.01
provided with various types of test equipment and signal sources, and are equipped with the
necessary panels and hardware for connecting and routing cables and jumpers between bays and
bay lineups.
Page 1-5
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
The following paragraphs briefly describe the bays, chassis, modules, and panels
3.02
available for designing a DSX-3 System. DSX-3 System components are described in detail in
ADC’s DSX-3 Catalog.
A. Drop-In Bays
DSX-3 drop-in bays are fully assembled with any of the various types of DSX modules,
3.03
chassis, and panels described in the following paragraphs. The input/output coaxial connectors,
cross-connect coaxial connectors or jacks, and patching jacks all reside in each single-circuit
module or 12- or 24-circuit panels.
Drop-in bays may be shipped with any number of DSX chassis, modules or panels
3.04
installed, and as termination requirements increase, additional units can be “dropped-in” and
wired into an existing bay in the office. A seven-foot bay has a capacity of up to 240 equipment
terminations using 24-circuit rear cross-connect chassis. A typical drop-in bay is shown in
Figure 1-4. Specific system design information is found in Section 2.
B. DSX-3 Chassis
DSX-3 chassis are loaded with individual modules, each module providing one network
3.05
element termination. These chassis may be purchased with capacities of 12, 16, 18, or 24
modules. Typical modules are shown in Figures 1-5 and 1-6 and a typical unloaded chassis is
shown in Figure 1-7. Typical internal wiring for a DSX-3 module is shown in Figure 1-8.
The DSX-3 modules may be purchased with standard or midsize coaxial jacks for
3.06
patching on the front and BNC or TNC connectors for interfacing equipment cables on the rear.
The modules are available with either front (standard or midsize) or rear (BNC or TNC) crossconnect interfaces. The modules are installed in the DSX-3 chassis when network elements are to
be cabled to the DSX.
When a patch cord is plugged into the monitor jack, a bridge is made on the network
3.07
element’s output providing a nonintrusive connection to the signal for monitoring. When a patch
cord is plugged into an IN or OUT jack, the active circuit is switched from the normal crossconnect path to the patch cord that is inserted, and the cross-connect is terminated to an internal
75 ohm ground.
Page 1-6
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
BLOWN FUSE
INDICATOR
USE
3 AMP
FUSE
MAXIMUM
50 AMP
MAXIMUM
TOTAL BUSS
AMPERAGE
4
8
12
DANGER
16
CKT
X-OUT
1-10
NEG (-)
11-20
REMOTE ALARMS
1-10
POS (+)
11-20
NEG (–)
BUS
GND
POS (+)
BUS
X-IN
– 48V
ONLY
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
X-IN
X-OUT
X-IN
X-OUT
X-IN
X-OUT
X-IN
X-OUT
X-IN
X-OUT
X-IN
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
CKT
X-OUT
6
19
CKT
X-IN
8
21
CKT
X-OUT
7
20
CKT
X-IN
6
19
CKT
X-OUT
8
21
CKT
X-IN
7
20
CKT
X-OUT
8
21
CKT
X-IN
7
20
CKT
X-OUT
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
8666-A
8665-A
Figure 1-4. Typical Rear Cross-Connect DSX-3 Drop-In Bay
Page 1-7
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
TRACER
LAMP
LAMP
SWITCH
TL
XO
MON
CROSS
CONNECT
OUT
CROSS
CONNECT
XI
–48V/GND
O
EQUIPMENT
CONNECTION
IN
I
EQUIPMENT
CONNECTION
SIDE VIEW
REAR VIEW
8637-A
Figure 1-5. Typical DSX-3 Rear Cross-Connect Module
5.14 IN
(13.06 CM)
0.70 IN
(1.78 CM)
MON
OUT
OUT
5.34 IN
(13.56 CM)
IN
IN
X-0
X-I
FRONT
VIEW
X-CONN
JUMPER
RETAINER CLIPS
SIDE VIEW
Figure 1-6. Typical DSX-3 Front Cross-Connect Module
Page 1-8
© 1996, ADC Telecommunications, Inc.
REAR
VIEW
5909-C
ADCP-80-323
1st Edition, Issue 2, December 1996
8639-A
Figure 1-7. Unloaded Chassis for DSX-3 Modules
TRACER
LAMP
-48V
MULTIPLE
GROUND
MULTIPLE
LAMP
SWITCH
TRACER
LAMP
JACK PIN
MON
X-IN
X-OUT
OUT
IN
OUT
IN
1872-A
Figure 1-8. Typical DSX-3 Module Schematic (Front Cross-Connect)
Page 1-9
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
DSX-3 modules are available in a number of configurations to allow the user a variety of
3.08
access options. Many of these modules, as seen in the DSX-3 catalog, are available for each type
of chassis.
1.
Single Monitor Module
1 MONITOR jack
1 IN and 1 OUT jack for each network element termination.
2.
Dual Monitor Module
2 MONITOR jacks (1 for each signal direction)
1 IN and 1 OUT jack for each network element termination.
3.
Performance Monitor Module
1 MONITOR jack
1 IN and 1 OUT jack for each network element termination.
1 BNC or SMA connector on rear for full-time monitoring of each network element
termination.
4.
Interconnect Module
a. Used with cross-connect for bidirectional access at each DSX position:
1 MONITOR jack, 1 IN jack, and 1 OUT jack for network element side.
1 MONITOR jack, 1 IN jack, and 1 OUT jack for cross-connect side.
b. Used without cross-connect feature
(2 network elements terminated on a single module):
1 MONITOR jack, 1 IN jack, and 1 OUT jack for network side.
1 MONITOR jack, 1 IN jack, and 1 OUT jack for customer side.
Typical applications include handling of a DS3 to an “Access Carrier” and end users.
C. DSX-3 Panels
DSX-3 panels are non-modular and available with 12 or 24 circuit terminations. The
3.09
panels have midsize coaxial jacks for patching at the front and BNC or TNC connectors for
interfacing equipment cables at the rear.
D. DSX-3 Plug-In Cross-Connect (PIX-DSX-3) Chassis
PIX-DSX-3 chassis are loaded with up to 24 individual PIX-DSX-3 modules. The
3.10
modules plug into a chassis backpanel which has connectors at the back for interfacing
equipment cables. This plug-in feature allows pre-cabling of network elements to the chassis
backpanel, and PIX-DSX-3 modules are not required until circuit turn-up. This differs from other
DSX designs that require modules when network elements are cabled to the DSX, and promotes
cost-deferred savings for the service provider.
Page 1-10
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
PIX-DSX-3 systems are available with front or rear cross-connects, standard or midsize
3.11
coaxial jacks, and BNC or TNC cable connectors. The tracer lamp for rear cross-connect
modules is activated by inserting a plug into the monitor jack. Accessing the monitor jack does
not disrupt the DS3 signal. A typical PIX-DSX-3 chassis, and module are shown in Figures 1-9
and 1-10. Additional information on the PIX-DSX-3 system can be found in User Manual
ADCP-80-315 and in the DSX-3 Catalog.
1904-A
FRAME -48A -48B RET
GRD
1
2
3
4
5
6
7
8
9
10
11
12
13
L P
MAJ
14
15
16
17
L P
MIN
18
ALARM
REF
19
20
21
22
23
24
1905-A
Figure 1-9. Unloaded PIX-DSX-3 Chassis
TL
MON
OUT
IN
1906-A
Figure 1-10. PIX-DSX-3 Module
Page 1-11
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
E. Interbay Patch Panels
Interbay patch panels are used for patching between bays when patch cord lengths
3.12
become excessive. These panels, placed in each maintenance bay, allow use of a series of short
patch cords to connect any two DSX positions in the same or adjacent bay lineups. The
originating DSX position is patched to the closest interbay panel and from there the signal is
transmitted via tie cables to other interbay panels in the bay lineup(s). The signal is then patched
from an associated interbay panel to the terminating DSX position to complete the circuit.
Interbay patch panels are available with either standard or midsize jacks. An interbay patch panel
with standard jacks is shown in Figure 1-11, and the application of interbay patch panels is
shown in Figure 1-12.
OUT
OUT
IN
IN
1907-A
Figure 1-11. Interbay Patch Panel with Standard Jacks
INTERBAY TIE CABLE
PATCH
CORD
NETWORK
ELEMENT
A
DSX-3
PATCH
CORD
INTERBAY
PATCH
PANEL
INTERBAY
PATCH
PANEL
DSX-3
NETWORK
ELEMENT
B
27-FOOT MAXIMUM (RG-59)
1873-A
Figure 1-12. Typical DSX-3 Interbay Patch Panel Application
F. Cross-Aisle Panels
Cross-aisle panels are used to extend cross-connects via tie cables between bay
3.13
lineups. Use of these panels eliminates the need to run cross-connect jumpers from one lineup
to another. Interlineup jumpers are simply connected to correspondingly numbered terminals
on the cross-aisle panels of the two bays being cross connected. Office repeaters are generally
required with the cross-aisle panel to extend the cross-connects beyond the 27-foot1 limit.
Cross-aisle panels are available in several configurations and circuit quantities, one of which
is shown in Figure 1-13. The application for a typical DSX-3 cross-aisle tie arrangement is
shown in Figure 1-14 and the application for a typical repeatered cross-aisle tie arrangement is
shown in Figure 1-15.
____________________________
The 27-foot limit applies to cross connects of RG-59 coaxial cable.
The Limits differ depending on the type of coaxial cable used.
1
Page 1-12
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1908-A
Figure 1-13. Typical DSX-3 Cross-Aisle Panel
CROSS AISLE TIE
CABLE
CROSS-CONNECTS
NETWORK
ELEMENT
A
DSX-3
CROSS-CONNECTS
CROSS
AISLE
PANEL
CROSS
AISLE
PANEL
DSX-3
NETWORK
ELEMENT
B
27-FOOT MAXIMUM (RG-59)
1874-A
Figure 1-14. Typical DSX-3 Cross-Aisle Tie Arrangement
CROSS-CONNECTS
NETWORK
ELEMENT
A
DSX-3
CROSSAISLE
TIE
CABLE
CROSS
AISLE
PANEL
CROSS-CONNECTS
CROSSAISLE
TIE
CABLE
CROSS
AISLE
PANEL
DUAL I/O
REPEATER
27 FT. MAX
DSX-3
NETWORK
ELEMENT
B
27 FT. MAX
550 FT.
MAX
550 FT.
MAX
1154 FEET
MAX
1875-A
Figure 1-15. Typical Repeatered Cross-Aisle Tie Arrangement
Page 1-13
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
G. Repeaters
Intraoffice Repeaters
Intraoffice Repeaters are used to regenerate digital DS3 signals when the distance
3.14
between DSX terminations exceeds the 27-foot1 limit or when network element coaxial cables
exceed the 450-foot1 limit. The single repeater, shown in Figure 1-16, regenerates one direction
of transmission and has an allowable input distance of 0 to 1,200 feet, and an adjustable output
for distances of up to 550 feet. The dual office repeater regenerates in both directions and has a
450-foot input distance and a 450-foot output distance.
Applications of dual repeaters are shown in Figures 1-17 and 1-18. Two single office
3.15
repeaters are required to regenerate a bidirectional DS3 signal, while one dual intraoffice
repeater can regenerate one bidirectional DS3 signal or two unidirectional DS3 signals.
IOR-D-T44/51-M
ADC
POWER
+
CHANNEL A
(LOS)
MINOR TRACER
MAJOR
CHANNEL B
(LOS)
MINOR
MAJOR
DE
STS1 MO
ING
M REPORT
MINOR ALCHANNEL
ON
OFF
A
L
CHANNE
B
3420-B
Figure 1-16. DS3 Single Intraoffic Repeater
CROSS-CONNECTS
NETWORK
ELEMENT
A
DSX-3
CROSSAISLE
TIE
CABLE
CROSS
AISLE
PANEL
CROSS-CONNECTS
CROSSAISLE
TIE
CABLE
CROSS
AISLE
PANEL
DUAL I/O
REPEATER
27 FT. MAX
DSX-3
27 FT. MAX
450 FT.
MAX
450 FT.
MAX
954 FEET MAX
Figure 1-17. Typical Repeatered Cross-Aisle Tie Arrangement
____________________________
The 27-foot limit applies to cross connects of RG-59 coaxial cable.
The 450-foot limit applies to IN/OUT cables based on 728A coaxial cable.
The limts differ depending on the type of coax cable used.
1
Page 1-14
© 1996, ADC Telecommunications, Inc.
NETWORK
ELEMENT
B
1877-A
ADCP-80-323
1st Edition, Issue 2, December 1996
MEETPOINT
REPEATER
NETWORK ELEMENT
450 FT.
MAX
1100 FT. MAX
NETWORK
ELEMENT
DUAL
REPEATER
DSX-3
450 FT. MAX
450 FT. MAX
1350 FEET MAX
1878-A
Figure 1-18. Typical Repeatered Network Element Cable
Bridging Repeaters
Bridging repeaters are used to regenerate low-level digital signals for IN-SERVICE
3.16
patching from DSX monitor jacks to spare facilities. The bridging repeater assembly, shown in
Figure 1-19, contains up to six single repeaters each of which can regenerate one unidirectional
signal (two required for bidirectional signal). Each repeater output can be patched to distances of
up to the standard cross-connect limit of 27-feet . The allowable input distance is also 27-feet.
The dual bridging repeater, shown in Figure 1-20, can regenerate two unidirectional signals or
one bidirectional signal. It has an input distance of up to 225 feet and an output distance of up to
225 feet, and is installed in a DS3 repeater chassis. Operational procedures for in-service
patching are shown in Section 4 of this manual.
B-IN
M4473-06
DC/DC
CONV A
P4473-20
DC/DC
CONV
ALARM
1
OUT MON
B-IN
2
OUT MON
B-IN
3
OUT MON
B-IN
4
OUT MON
DC/DC
CONV B
P4473-20
DC/DC
CONV
ALARM
T4473-01
DS3
BRIDGING
REPEATER
LOS
T4473-01
DS3
BRIDGING
REPEATER
LOS
6515-A
Figure 1-19. DS3 Bridging Repeater Assembly
Page 1-15
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
DS3/STS1 DUAL BRIDGING
OFFICE REPEATER
BOR-D-T44/51-4M-M
POWER
(GREEN)
POWER
MINOR ALARM,
CHANNEL A
(YELLOW)
CHANNEL A
MINOR(LOS)
OUT
A
MAJOR
IN
A
MAJOR ALARM,
CHANNEL A
(RED)
MINOR ALARM,
CHANNEL B
(YELLOW)
MINOR ALARM,
CHANNEL B
(RED)
CHANNEL B
MINOR(LOS)
MON
B
OUT
B
MAJOR
STS1
DS3
MODE
MAJOR ALARM
DISABLE
SWITCHES
MON
A
IN
B
ON
OFF
A
B
MINOR ALARM
REPORTING
5635-C
Figure 1-20. Dual Bridging Repeater
H. Equipment Racks
Channel, unequal flange, and network equipment racks, shown in Figures 1-21, 1-22,
3.17
and 1-23, are available in heights of 7, 9, and 11.5 feet. Channel racks have 1.75-inch mounting
spaces, may be floor or overhead supported, and are 19 or 23 inches wide. Unequal flange and
network racks have either 1.75 or 2.0 inch mounting spaces and are 23 inches wide. Various rack
guard box options are available to protect equipment installed within the rack. A modified 7-foot
rack, 23 inches wide equipped with cable ducts and arranged for 13.5-inch width mountings is
also available for 12-circuit DSX-3 panels, as shown in Figure 1-24.
Page 1-16
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
1879-A
Figure 1-21. Channel Rack
1881-A
Figure 1-23. Unequal Flange Rack
1880-A
Figure 1-22. Network Rack
1882-A
Figure 1-24. Unequal Flange Rack
for 13.5 DSX Panels
Page 1-17
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
I.
Cable Routing Hardware
Various cable rings, troughs and brackets are available for orderly vertical and horizontal
3.18
routing of all cross-connect cabling on DSX bays. Proper use of the available hardware will
ensure minimal cable congestion, simplified system installation and maintenance, and readily
identifiable equipment terminations and cross connections. A typical horizontal cable trough and
ring panel are shown in Figures 1-25 and 1-26. Horizontal cable troughs or ring panels are
provided at the top and bottom of each DSX-3 bay to provide a wireway for cross-connect
jumpers extending between bays within a lineup. Cable rings and troughs are mounted at the
front of equipment racks for front cross-connect systems and at the rear for rear cross-connect
systems. Vertical cable rings for cross-connect jumpers are typically provided with each modular
chassis.
8595-A
Figure 1-25. Typical Horizontal Cable Trough
8596-A
Figure 1-26. Typical Horizontal Ring Panel
J. Communications Panels
Communications Panels may be installed in maintenance bays to provide voice commu–
3.19
nications by telephone to other locations. The communications panel is shown in Figure 1-27.
Calls may be placed or received at this panel to coordinate maintenance activities.
Page 1-18
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
ANAL
OG
LINE
HDST
–48V
ON
F HO
OK
CON
ON
COM
OFF
MUN
HOLD
1
2
3
4
ICAT
IONS
PANE
L CO
5
6
MP-
21
7
8
9
1
GH I
4
PR S
ABC
2
JK L
5
7
TU V
*
OPE
R
8
D EF
3
MNO
6
WX Y
0
9
#
6225-A
Figure 1-27. Communications Panel
K. Fuse Panels
Fuse Panels are available to protect power circuitry in a DSX bay. Fuse panels are
3.20
equipped with indicators which light to show a blown fuse and each panel may be connected to a
remote alarm system. Some fuse panels also have an audible alarm. Typical fuse panels are
shown in Figure 1-28.
BLOWN FUSE
INDICATOR
USE
3 AMP
FUSE
MAXIMUM
50 AMP
MAXIMUM
TOTAL BUSS
AMPERAGE
4
8
12
16
FRONT VIEW
A
B
C
D
E
F
1
2
3
4
5
6 7
8
9
10
1-10
NEG (-)
11-20
REMOTE ALARMS
1-10
POS (+)
11-20
NEG (–)
BUS
GND
POS (+)
BUS
REAR VIEW
– 48V
ONLY
2389-B
Figure 1-28. Typical Fuse Panel
L. Accessories
Patch cords, plugs and circuit guards are available, as well as cross-connect cables and
3.21
wiring. Various types of circuit designation cards and strips are also available for relabeling the
front and rear panel connections. Accessory items can be found in ADC’s DSX-3 Catalog.
Page 1-19
© 1996, ADC Telecommunications, Inc.
SYSTEM DESIGN
ADCP-80-323
1st Edition, Issue 2, December 1996
SECTION 2
SYSTEM DESIGN
Content
Page
1. GENERAL ........................................................................... 2-1
2. INITIAL CONSIDERATIONS ............................................................. 2-2
A.
Floor Space ...................................................................... 2-2
B.
Circuit and Cable Densities .......................................................... 2-4
C.
Cross-Connect Wireways ............................................................ 2-4
D.
Extension of an Existing Lineup ...................................................... 2-5
3. DESIGNING THE SYSTEM .............................................................. 2-5
A.
DSX Interface ..................................................................... 2-5
B.
Chassis/Panel and Bay Selection...................................................... 2-6
C.
Cross Aisle Panels ................................................................. 2-8
D.
Intraoffice Repeaters ............................................................... 2-9
E.
Maintenance Panels ............................................................... 2-11
F.
DSX Bays ....................................................................... 2-11
G.
DSX-3 Skeleton Bays .............................................................. 2-14
H.
Bay Spacer/Filler Panels ........................................................... 2-14
I.
Equipment Cabling................................................................ 2-15
J.
Cross-Connect Cabling ............................................................ 2-21
K.
Assignment of Network Elements .................................................... 2-24
L.
Final System Design .............................................................. 2-25
1. GENERAL
This section provides all instructions necessary to design a complete DSX-3 system or to
1.01
expand an existing DSX-3 system to meet the needs of an individual office. It is recommended
that the entire section be read and understood prior to beginning actual design. Additional
equipment and ordering information can be found in ADC’s DSX-3 catalog. ADC application
engineers are available to design the system for the user or to assist the user in designing his or
her own system.
New and expanded DSX-3 Systems are designed using worksheets provided at the back
1.02
of this Application Guide. Additional copies of each worksheet may be copied as necessary.
2. INITIAL CONSIDERATIONS
The following is a list of basic physical design considerations for DSX-3 System layouts.
Thorough explanation of these considerations are detailed in this section:
1.
Unequal flange or network racks are recommended for the efficient management of
IN/OUT equipment cables.
2.
When using racks taller than 7 feet, rack spaces above the 7-foot level are not used for
DSX. This eliminates the need for ladders when circuit access or maintenance is
required.
Page 2-1
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
3.
Spacing between bays and at lineup ends may be required depending on the quantity and
type of coaxial cable entering the bays. When spacing bays 0, 5, or 10 inches, verify that
vertical jumper rings will fit between bays.
4.
Fuse panels should be placed in the uppermost part of the bay, above the horizontal
wireway on rear cross-connect bays and below the horizontal wireway on front crossconnect bays.
5.
An upper and lower horizontal wireway should be provided in each bay.
6.
Horizontal wireways should be sized according to calculations in worksheet 6.
7.
Horizontal wireways should be at the same height in each bay throughout the lineup.
8.
Cross aisle panels should be provided, or space reserved, in each bay unless there will
never be more than one lineup in the central office.
9.
Maintenance bays should be located at every third bay throughout the lineup.
10.
Maximum equipment cables and cross-connect jumper electrical lengths should not be
exceeded.
A. Floor Space
When designing a new or expanded DSX-3 System it is important to determine as
2.01
accurately as possible the number of DSX terminations required over the life of the central
office.
Note: When floor space becomes exhausted it is possible to tie two central DSX lineups
(or zones in a large lineup) together with the use of repeaters, thus extending the life of
the existing equipment.
Figure 2-1 shows examples of single-, double-, and triple- line up DSX-3 Systems. Aisle
2.02
spacing may be determined by local company practices but a recommended minimum of 2.5 feet
(0.76 meters) between lineups will provide room for personnel to install and maintain the
equipment.
The overall number of bays in a lineup (or zone of a large lineup) will depend on the
2.03
electrical length limitation for the selected cross-connect jumper type and the amount of spacing
required between bays for the selected cabling type in the DSX system. Horizontal wireway
design capacity will also limit the maximum lineup length. Figure 2-2 shows an example of a
large DSX-3 System with a number of zones. Each zone represents the maximum length of a
cross-connect jumper. Jumpers running between zones may require the use of an intraoffice
repeater.
Page 2-2
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
LINEUP
1
.01
.02
.03
.04
.05
.06
12" MIN
.05
.06
12" MIN
SINGLE LINEUP
LINEUP
1
.01
.02
.03
.04
30" MIN
2
.01
.02
.03
.04
.05
.06
.05
.06
12" MIN
DOUBLE LINEUP
LINEUP
1
.01
.02
.03
.04
12" MIN
30" MIN
2
.01
.02
.03
.04
.05
.06
12" MIN
30" MIN
3
.01
.02
.03
.04
.05
.06
12" MIN
TRIPLE LINEUP
1846-A
Figure 2-1. Typical Single-, Double-, and Triple Lineup DSX-3 Systems
Page 2-3
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
ZONE 1
.01
.02
.03
ZONE 2
.04
.05
.06
.07
.08
.09
.10
.11
.12
.11
.12
.11
.12
RR101
ZONE 4
ZONE 3
.01
.02
.03
.04
.05
.06
.07
.08
.09
.10
RR102
ZONE 5
.01
.02
.03
ZONE 6
.04
.05
.06
.07
.08
.09
.10
RR103
1847-A
Figure 2-2. Typical Large DSX-3 System Showing Maximum Cross-Connect Zones
Unequal flange or network type racks are recommended for full bay and multiple bay
2.04
configurations because of the cable duct area provided for routing equipment cables into the
rack. The cable duct area is formed at the rear when racks are placed adjacent to each other. The
required spacing between racks depends on the quantity and size of cables entering the bays.
B. Circuit and Cable Densities
Use of high-density (24 circuit) DSX-3 chassis or panels will optimize the available DSX
2.05
floor space. Use of miniature cable and cross-connect jumpers (735A) whenever possible will
enhance cable management by reducing congestion in the cable racking and jumper wireways.
The maximum density configuration is 240 terminations per 7 foot bay using 24-circuit
2.06
rear cross-connect chassis. Ancillary equipment (interbay patch panel, communication panel,
bridging office repeaters, etc.) in maintenance bays will subtract from this maximum quantity.
When multiple lineups are designed, space must be reserved for cross aisle panels in each
2.07
bay for cross-connecting between lineups or zones. If intraoffice repeaters are required for the cross
aisle ties, they may be located outside of the designated DSX area in order to maximize DSX
terminations. The dual office repeater has an input up to 450 feet and an output of up to 450 feet.
C. Cross-Connect Wireways
Vertical wireways within a bay are created by cable rings attached to each DSX chassis
2.08
or panel. The cable rings are generally provided with each chassis or panel; however, optional
ring kits are available for various cross-connect densities and bay spacing configurations. The
type of cable and number of terminations are factors to consider when selecting proper ring size.
Bays must be equipped with upper and lower horizontal cable troughs to create wireways
2.09
spanning the entire length of a DSX lineup. These wireways provide a path to route crossconnect jumpers between any two points within the lineup. Wireways are installed on the front of
bays in front cross-connect systems and on the rear of bays in rear cross-connect systems. The
horizontal cable trough size must be determined at the time of the DSX-3 lineup layout.
Page 2-4
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
Coaxial cross-connect jumpers may be purchased with connectors pre-terminated on
2.10
both ends. These jumpers will generally have some excess length after routing through
wireways. This excess should be stored outside of the wireways to prevent cross-connect
congestion. Cross-connect jumpers may also be purchased with connectors pre-terminated on
only one end and the other end is cut and terminated on site to eliminate excess slack.
D. Extension of an Existing Lineup
A DSX-3 system may be expanded by either extending existing lineups or providing new
2.11
lineups and connecting to existing lineups with tie cables. Existing lineups with low density (12,
16, or 18 circuit) chassis or panels may be expanded using higher density (24 circuit) chassis or
panels. When existing lineups are to be extended:
(a)
Continue with the same type (front or rear cross-connect) equipment.
(b)
Align horizontal wireways with existing wireways.
Note: The expansion may require larger wireways if expanding with higher density
chassis or panels.
(c)
Use bays of the same height as existing bays.
When expanding with new lineups, determine if intraoffice repeaters are required for tie cables
to the existing lineup.
3. DESIGNING THE SYSTEM
A. DSX Interface
3.01
Identify the types of digital transmission systems in which the DSX system will be used:
(a)
DS-3: 44.736 megabits per second. Includes digital radios, fiber optic terminals, and
M13 multiplexers.
(b)
DS-4NA: 139.264 megabits per second. Includes digital radios, T4M digital lines, and
multiplexers.
(c)
STS-1: 51.840 megabits per second. Includes SONET fiber optic terminals.
(d)
STS-3: 155.520 megabits per second. Includes SONET fiber optic terminals.
Since SONET type fiber optic terminals may be optioned for DS-3, STS-1 or STS-3 electrical
rates, the DSX-3 system may include any and all of these different interface rates. When crossconnecting two network elements, the signal rates must be the same. Cross-connect lengths will
vary between the different signal rates and must be administered to ensure that cross-connect
limits are not violated.
Page 2-5
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
B. Chassis/Panel and Bay Selection
Drop-In (Modular) Bay Chassis and Panels
Bays do not initially need to be fully equipped with DSX chassis or panels. Bays should
3.02
initially be equipped with properly sized upper and lower horizontal cable troughs for the
maximum system configuration and a fuse panel. Chassis or panels may be installed as required
for system growth and are added from the bottom of the rack to the top to ease installation of
cables into the bay. Tables 2-1, 2-2, and 2-3 summarize DSX chassis and panels available from
ADC for use in DSX-3 Drop-In (modular) bays. Additional information can be found in ADC’s
DSX-3 Catalog. Table 2-4 shows the maximum number of chassis or panels in a 7 foot bay.
DSX-3 chassis or panels and horizontal cable troughs are recommended to stay below the 7 foot
level of any bay to facilitate testing and patching operations without the use of ladders.
Determine the type of DSX chassis or panel to be used in the DSX System.
Table 2-1. DSX-3 Modular Chassis Configurations
19-INCH WIDTH
ADC
TYPE
CROSSCONNECTS
JACKS
(FRONT)
CONNECTORS HEIGHT
NO. OF
(REAR)
(INCHES) TERMINATIONS
DSX4M
Front
Standard
or Midsize
BNC or TNC
6.0 or 7.0
DSX-4M
Rear
Standard
or Midsize
BNC or TNC
DSX-4B
Front
Midsize
DSX4H
Rear
Standard
or Midsize
PIX-3
Front
Standard
or Midsize
PIX-3
Rear
Standard
or Midsize
23-INCH WIDTH HEIGHT
HEIGHT
(INCHES)
NO. OF
TERMINATIONS
12
6.0 or 7.0
12
6.0 or 7.0
16
6.0 or 7.0
16, 18, or 20
BNC
—
—
7.0
24
BNC or TNC
6.0 or 7.0
18
6.0 or 7.0
18 or 24
BNC or TNC
—
—
7.0
24
BNC or TNC
—
—
6.0
24
Note: 6.0-inch chassis are for racks with 2.0 inch WECO mounting spaces.
7.0-inch chassis are for racks with 1.75-inch EIA mounting spaces.
Table 2-2. DSX-3 Non-Modular Panel Configurations
19-INCH WIDTH
ADC
TYPE
CROSSJACKS CONNECTORS HEIGHT
CONNECTS (FRONT)
(REAR)
(INCHES)
23-INCH WIDTH HEIGHT
NO. OF
TERMINATIONS
HEIGHT
(INCHES)
NO. OF
TERMINATIONS
DSX-4A
Front
Midsize
BNC or TNC
6.0
12
—
—
DSX-4B
Front
Midsize
BNC
6.0 or 7.0
16
7.0
24
DSX-4C
Front
Midsize
TNC
—
—
—
—
Note: 6.0-inch panels are for racks with 2.0-inch WECO mounting spaces.
7.0-inch panels are for racks with 1.75-inch EIA mounting spaces.
13.5-inch width panels install in a special rack preconfigured with
all cable management hardware.
Page 2-6
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
Table 2-3. DSX-3 Minimum Point of Presence Modules
ADC
TYPE
CROSSCONNECTS
JACKS
(FRONT)
DS3
MPOPRAHCH
MPOPC
None
Standard
or
Midsize
Rear BNC
or TNC
None
DS-3
MPOP
FA-19
None
Standard
or
Midsize
Standard
or
Midsize
DS-3
MPOP
FA-23
None
Standard
or
Midsize
CONNECTORS WIDTH
(REAR)
(INCHES)
HEIGHT
(INCHES)
NO. OF
TERMINATIONS
FEATURE
19.0 or
23.0
1.75
6
Rack-Mount
Modular
Rear BNC
or TNC
19.0 or
23.0
3.50
24
Rack-Mount,
Modular
Front BNC
19.0
1.75
6
Front BNC
23.0
1.75
8
Rack-Mount,
Total Front
Access,
Modular
Rack-Mount,
Total Front
Access,
Modular
* Number of network element terminations = half on the network side and half on the customer side.
Table 2-4. Maximum Chassis or Panels Per 7 Foot Rack
DSX TYPE
Front Cross-Connect
DSX-4A 12 Circuit Panel
DSX-4B 12 Circuit Panel
DSX-4C 12 Circuit Panel
DSX4M 12 Circuit Chassis
DSX-4B 24 Circuit Panel
DSX-4B 24 Circuit Chassis
PIX-3 24 Circuit Chassis
Rear Cross-Connect
DSX4M 16 Circuit Chassis
DSX4M 18 Circuit Chassis
DSX4M 20 Circuit Chassis
DSX4H 24 Circuit Chassis
PIX-3 24 Circuit Chassis
QUANTITY
6 Inch Version
10
10
10
10
N/A
N/A
N/A
10
10
10
10
10
10
7 Inch Version
N/A
N/A
N/A
9
9
9
9
9
9
9
9
9
N/A
* Maximum quantity assumes (2) 6 inch high cable troughs and (1) 2 inch high fuse panel installed in bay.
Page 2-7
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
C. Cross Aisle Panels
Cross aisle panels provide a means for cross-connecting from one bay lineup to another
3.03
without running individual cross-connect jumpers in the overhead cable rack. Cross-connection
between network elements will change over time. Placing cross-connect jumpers in the overhead
racking with permanent equipment cables will inhibit future cross-connect changes and will
create cable pileups in the overhead racking. Terminating permanent tie cables on cross aisle
panels in separate lineups allows the placement of short cross-connects at each end to connect
between the lineups. Purchase of cross aisle panels may be deferred until additional lineups are
built, but it is critical to reserve space in initial bays if multiple lineup arrangements may occur.
Large central offices may develop DSX-3 systems on separate floors of a building that will
require tie cables to connect between systems. Table 2-5 summarizes several of the cross aisle
panels available from ADC. Additional information can be found in ADC’s DSX-3 Catalog.
Table 2-5. Cross-Aisle Panel Configuration
CONNECTOR TYPES
ADC TYPE
CROSS
NO. OF
CROSSCONNECTS TERMINATIONS CONNECT
TIE
CABLE
PANEL
WIDTH
(INCHES)
PANEL
HEIGHT
(INCHES)
MONITOR
JACKS
DSX-XA-MB
Front
12
Midsize
BNC
13.5
3.0
Yes
DSX-XA-MB
Front
12
Midsize
BNC
19.0 or 23.0
4.0
No
DSX-XA-MB
Front
24
Midsize
BNC
23.0
4.0
No
DSX-XA-BB
Rear
16
BNC
BNC
19.0 or 23.0
3.5 or 4.0
No
DSX-XA-BB
Rear
24
BNC
BNC
23.0
5.25
No
The quantity of cross aisle ties should be based on the maximum DSX System design.
3.04
Cross aisle tie quantities for multiple lineup systems will vary from office to office. A typical
ratio of cross aisle ties to DSX terminations is recommended to be 25%. When determining a
ratio for a particular office, the following considerations should include:
(a)
Number of lineups or zones.
(b)
The spread and ratio of different equipment types (i.e., fiber optic terminals and
multiplexers) within a lineup or zone.
(c)
Administrating cross-connects to stay within a lineup or zone whenever possible.
Determine the current and future requirements of multiple DSX-3 lineups in the office and
select the appropriate type of cross aisle panel to be used in the DSX System.
Because of the limit on cross-connect lengths, extending cross-connects between lineups
3.05
generally requires the use of intraoffice repeaters. Cross aisle tie cabling without repeaters is
shown in Figure 2-3. Cross aisle tie cabling with repeaters is shown in Figure 2-4. Direct cross
aisle tie cabling is shown in Figure 2-5 where each bay is cabled directly across the aisle(s) to
same numbered bays in each lineup. Zoned cross aisle tie cabling is shown in Figure 2-6 where a
portion of the cross aisle panel in each bay is cabled to bays in different zones of the DSX
System.
Page 2-8
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
D. Intraoffice Repeaters
When a cross-connect that exceeds the maximum length must be made, an intraoffice
3.06
repeater is required as shown in Figure 2-4. Repeaters used for the extension of cross-connects
are wired between cross aisle panels in the DSX. Intraoffice repeaters can also extend the cable
lengths from the network element to the DSX-3 as shown in Figure 2-7. Repeaters used to extend
equipment cables to the DSX-3 are wired between a network element and the DSX.
A single repeater regenerates one direction of transmission while a dual repeater
3.07
regenerates two directions. Every bi-directional DS-3 signal that requires regeneration will
require two single or one dual intraoffice Repeater. The repeater output of up to 450 feet is
consistent with the DSX equal level point of ±0.36 to ±0.85 Vdc (±0.5 Vdc nominal). Intraoffice
repeaters may be located outside of the DSX-3 lineups in order to maximize the number of DSX
network element terminations. If intraoffice repeaters are located in the DSX System,
determine quantity and location of repeater chassis in appropriate DSX-3 bays.
CROSS-AISLE TIE CABLE
CROSS-CONNECTS
CROSS-CONNECTS
LINE
CROSS
AISLE
PANEL
DSX-3
CROSS
AISLE
PANEL
DSX-3
EQUIPMENT
27-FOOT MAXIMUM (RG-59)
1848-A
Figure 2-3. Typical DSX-3 Cross-Aisle Tie Arrangement
CROSS-CONNECTS
CROSS-CONNECTS
CROSS - AISLE
TIE CABLE
LINE
DSX-3
CROSS
AISLE
PANEL
CROSS - AISLE
TIE CABLE
CROSS
AISLE
PANEL
DUAL I/O
REPEATER
27 FT. MAX
DSX-3
EQUIPMENT
27 FT. MAX
450 FT. MAX
450 FT. MAX
NOTE:
MAX X-CONN FEET
SHOWN ARE FOR RG-59.
954 FEET MAX
CABLE LENGTH BASED ON
728A TYPE COAX CABLE
1849-A
Figure 2-4. Typical Repeatered Cross-Aisle Tie Arrangement
Page 2-9
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
LINEUP
1
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
*
LINEUP
2
*
*
LINEUP
3
*50% OF CROSS-AISLE TIES;
SAME FOR ALL BAYS.
1850-A
Figure 2-5. DSX-3 Cross Panel Direct Cabling
ZONE 1
ZONE 2
LINEUP
1
1
2
3
4
5
6
7
8
LINEUP
2
1
2
3
4
5
6
7
8
LINEUP
3
1
2
3
4
5
6
7
8
1851-A
Figure 2-6. DSX-3 Cross-Aisle Panel Two-Zone Cabling
MEETPOINT
REPEATER NETWORK ELEMENT
450 FT.
MAX
900 FT. MAX
LINE
NETWORK
ELEMENT
DUAL
REPEATER
DSX-3
450 FT. MAX
450 FT. MAX
1350 FEET MAX
1852-A
Figure 2-7. Typical Repeatered Network Element Cable
Page 2-10
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
E. Maintenance Panels
It is recommended that each third bay in each lineup be designated as a maintenance bay.
3.08
Equipment in maintenance bays along with DSX-3 chassis or panels may include any or all of
the following maintenance items :
•
Interbay Patch Panel — Cabling of interbay patch panels is illustrated in Figure 2-8.
•
Communication Panel
•
Writing Shelf
•
Bridging Office Repeaters
•
Customer Provided Test Equipment
•
AC Outlet For Portable Equipment
Determine type, quantity, and location of maintenance equipment to be used in the
DSX System.
F. DSX Bays
A typical DSX-3 bay is equipped with a fuse panel and an upper and lower horizontal
3.09
cable trough. The remaining rack spaces may be filled with DSX-3 chassis or panels (and
maintenance equipment in designated maintenance bays). DSX-3 chassis or panels and
horizontal cable troughs are recommended to stay below the 7 foot level of any bay to facilitate
testing and patching operations without the use of ladders.
Unequal flange or network type racks are recommended for full bay and multiple bay
3.10
configurations because of the cable duct area for routing equipment cables into the rack. The
cable duct area is formed at the rear when racks are placed adjacent to each other. The required
spacing between racks depends on the quantity and size of cable entering the bays. Figure 2-9
shows a network bay with spacer/filler panels and end guard. Table 2-6 summarizes the general
bay characteristics available for DSX Systems. Select the type of bay to be used in the
DSX System.
Table 2-6. Bay Characteristic
Bay Height
Bay Width
Bay Type
Mounting Type
7 foot
9 foot
11.5 foot
23 inch
19 inch
Network*
Unequal Flange*
Channel
2 inch WECO
1.75 inch EIA
Page 2-11
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
24 CIRCUITS
1
2
MTCE
3
4
5
6
MTCE
7
8
9
6
MTCE
7
8
9
6
MTCE
7
8
9
6
MTCE
7
8
9
6
MTCE
7
8
9
6
MTCE
7
8
9
SINGLE LINEUP
4 CIRCUITS
1
2
MTCE
3
4
4 CIRCUITS
8 CIRCUITS
1
2
5
MTCE
3
4
5
DOUBLE LINEUP
4 CIRCUITS
1
2
MTCE
3
4
4 CIRCUITS
4 CIRCUITS
1
2
MTCE
3
4
2
MTCE
3
5
4 CIRCUITS
4 CIRCUITS
1
5
4
5
TRIPLE LINEUP
NOTE: REPEATERS BETWEEN
LINEUPS ARE NOT SHOWN
1853-A
Figure 2-8. Interbay Patch Panel Cabling
Page 2-12
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
FILLER PANEL
NETWORK RACK
(UNEQUAL FLANGE TYPE)
FILLER PANEL
END GUARD
UNEQUAL FLANGE RACK WITH CABLE
FILLER PANELS AND END GUARD
1854-A
Figure 2-9. Unequal Flange Rack with Cable Filler Panels and End Guard
Page 2-13
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
G. DSX-3 Skeleton Bays
Skeleton bays (or lineup of bays) may be designed that are equipped with all appropriate
3.11
hardware but not initially equipped with DSX chassis or panels. DSX-3 chassis or panels are
then installed when equipment additions are cabled to the DSX. A typical skeleton bay with
vertical and horizontal jumper rings and troughs and fuse panel is illustrated in Figure 2-10.
Worksheets 1 through 5 in section 6 of this application guide provide layouts for
3.12
configuring the DSX-3 bay configurations. Typical configuration layouts for front and rear
DSX-3 bays are shown in:
•
Figure 2-11 – DSX-3 concentration bay with 7 inch chassis or panel
•
Figure 2-12 – DSX-3 maintenance bay with 7 inch chassis or panel
•
Figure 2-13 – DSX-3 concentration bay with 6 inch chassis or panel
•
Figure 2-14 – DSX-3 maintenance bay with 6 inch chassis or panel
Fill in the the appropriate worksheet(s) for DSX-3 bay configuration.
H. Bay Spacer/Filler Panels
Spacing between bays may be required for the given quantity and type of cables entering
3.13
each bay. After configuring bays, determine the total quantity of DSX and cross-aisle
terminations within a bay. Table 2-7 lists the minimum spacing required between unequal flange
or network type racks for the maximum circuit termination quantity of each type of coaxial cable
used in the DSX-3 System. When spacing 0 or 5 inches between bays, smaller vertical rings
(than typically provided with chassis or panel) may be required for jumpers. Determine amount
of spacing required between bays.
Table 2-7. Maximum IN/OUT Cable Quantities In Duct Area Between
Unequal Flanged Type Racks
MAXIMUM TERMINATION QUANTITY*
FOR INDICATED RACK SPACING
CABLE
TYPE
NUMBER OF
CABLES PER
SQUARE
INCH
NO SPACING
2.5 INCH
SPACING
5 INCH
SPACING
10 INCH
SPACING
735A
33
270 CKT
460 CKT
750 CKT
1050 CKT
734A
12
100 CKT
165 CKT
240 CKT
380 CKT
RG59
12
100 CKT
165 CKT
240 CKT
380 CKT
* Each termination consists of one transmit and one receive cable.
Note: Verify that vertical jumper ring size will fit between racks.
Page 2-14
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
I.
Equipment Cabling
Signal Levels
Each DSX System serves as an equal level transmission point, and all digital signals
3.14
crossing the DSX must be maintained within a certain voltage range for each specific signal rate.
The peak-to-base voltage range for DS-3 signals at the DSX-3 is ± 0.36 to ± 0.85 Vdc (± 0.5
nominal). The network elements terminated on the DSX-3 System have pads and equalizers
which are set to compensate for different cable lengths.
Equipment Cable Types and Lengths
All DS-3 cables should be 75 ohm coaxial. The maximum cable lengths between
3.15
network elements and the DSX-3 system are listed in Table 2-8 for the specific signal rates.
Cable build up and congestion along with location of network elements in relation to the DSX-3
System should be considered. 735A type coaxial cable has the smallest diameter listed and is
recommend when cable congestion is a concern.
Table 2-8. Electrical Limits of Cables and Cross-Connects
SIGNAL RATES
CABLE TYPE
734A
728A
RG59
735A
DS-3
44.736MB
STS-1
51.840MB
DS4NA
139.264MB
STS-3
155.520MB
473 Ft
(144.2 m)
450 Ft.
(137.2 m)
336 Ft.
(102.4 m)
225 Ft
(68.6 m)
440 Ft
(134.1 m)
418 Ft
(127.4 m)
317 Ft
(96.6 m)
215 Ft
. (65.5 m)
268 Ft
(81.7 m)
255 Ft.
(77.7 m)
193 Ft.
(58.8 m)
146 Ft
(44.5 m)
253 Ft
(77.1 m)
241 Ft.
(73.5 m)
183 Ft
. (55.8 m)
125 Ft.
(38.1 m)
IN/OUT CABLE LIMITS BETWEEN NETWORK ELEMENTS AND DSX-3
SIGNAL RATES
CABLE TYPE
RG59
735A
TRIAX
DS-3
44.736MB
STS-1
51.840MB
DS4NA
139.264MB
STS-3
155.520MB
26.3 Ft
(8.0 m).
20.6 Ft
(6.3 m)
13.5 Ft
(4.1 m)
23.9 Ft
(7.3 m)
18.0 Ft
(5.5 m)
12.5 Ft
(3.8 m)
15.1 Ft
(4.6 m)
13.0 Ft.
(4.0 m)
7.6 Ft.
(2.3 m)
14.1 Ft.
(4.3 m)
11.0 Ft.
(3.4 m)
7.0 Ft.
(2.1 m)
CROSS-CONNECT JUMPER LIMITS BETWEEN DSX-3 POSITIONS
Page 2-15
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
CABLE TROUGH
FUSE PANEL
LOCATION 9
LOCATION 8
LOCATION 7
LOCATION 6
LOCATION 5
VERTICAL RING KITS
ATTACHED TO DSX-3 BAY
LOCATION 4
LOCATION 3
LOCATION 2
LOCATION 1
CABLE TROUGH
TYPICAL DSX-3 SKELETON BAY EQUIPPED WITH VERTICAL RING KITS, UPPER AND LOWER CABLE
TROUGHS AND FUSE PANEL.
1855-A
Figure 2-10. Typical DSX-3 Skeleton Bay Equipped with Vertical Ring Kits,
Upper and Lower Cable Troughs and Fuse Panel
Page 2-16
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
39
CABLE TROUGH
FUSE PANEL
35
LOCATION 9
30
LOCATION 8
LOCATION 7
25
LOCATION 6
20
STANDARD DSX-3 CHASSIS OR
LOCATION 5
7 FT
PANEL
LOCATION 4
15
LOCATION 3
10
LOCATION 2
2.00
5
LOCATION 1
CABLE TROUGH
1
4.50
TYPICAL DSX-3 CONCENTRATION BAY 7" HIGH FRONT
CROSS-CONNECT CHASSIS OR PANEL
1856-A
Figure 2-11. Typical DSX-3 Concentration Bay
7 Inch High Front Cross-Connect Chassis or Panel
Page 2-17
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
39
CABLE TROUGH
FUSE PANEL
35
LOCATION 9
30
NOTE: RESERVE LOCATION 9 FOR
CROSS AISLE PANEL IN MULTIPLE
LINEUP CONFIGURATIONS
LOCATION 8
STANDARD DSX-3 CHASSIS OR
PANEL
LOCATION 7
25
COMMUNICATION PANEL
LOCATION 6
INTERBAY PATCH PANEL
20
LOCATION 5
7 FT
LOCATION 4
15
STANDARD DSX-3 CHASSIS OR
PANEL
LOCATION 3
10
LOCATION 2
2.00
LOCATION 1
5
DS-3 BRIDGING OFFICE REPEATER
CABLE TROUGH
1
4.50
TYPICAL DSX-3 MAINTENANCE BAY 7" HIGH FRONT
CROSS-CONNECT CHASSIS OR PANEL
Figure 2-12.Typical DSX-3 Maintenance Bay
7 Inch High Front Cross-Connect Chassis or Panel
Page 2-18
© 1996, ADC Telecommunications, Inc.
1857-A
ADCP-80-323
1st Edition, Issue 2, December 1996
FUSE PANEL
39
BLANK PANEL (FRONT)
CABLE TROUGH (REAR)
35
BLANK PANEL (FRONT)
RESERVE FOR REAR CROSS AISLE PANEL
IN MULTIPLE LINEUP CONFIGURATION
LOCATION 10
30
LOCATION 9
LOCATION 8
25
LOCATION 7
20
LOCATION 6
7 FT
LOCATION 5
STANDARD DSX-3
CHASSIS OR PANEL
15
LOCATION 4
LOCATION 3
10
2.00
LOCATION 2
5
LOCATION 1
BLANK PANEL (FRONT)
CABLE TROUGH (REAR)
1
4.50
TYPICAL DSX-3 CONCENTRATION BAY 6" HIGH REAR
CROSS-CONNECT CHASSIS OR PANEL
1858-A
Figure 2-13. Typical DSX-3 Concentration Bay
6 Inch High Rear Cross-Connect Chassis or Panel
Page 2-19
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
39
FUSE PANEL
BLANK PANEL (FRONT)
CABLE TROUGH (REAR)
35
BLANK PANEL (FRONT)
LOCATION 10
30
LOCATION 9
STANDARD DSX-3
CHASSIS OR PANEL
LOCATION 8
25
LOCATION 7
COMMUNICATION PANEL
20
LOCATION 6
7 FT
INTERBAY PATCH PANEL
LOCATION 5
15
LOCATION 4
STANDARD DSX-3
CHASSIS OR PANEL
LOCATION 3
10
LOCATION 2
2.00
5
LOCATION 1
DS-3 BRIDGING OFFICE REPEATER
BLANK PANEL (FRONT)
CABLE TROUGH (REAR)
1
4.50
TYPICAL DSX-3 MAINTENANCE BAY 6" HIGH REAR
CROSS-CONNECT CHASSIS OR PANEL
1859-A
Figure 2-14. Typical DSX-3 Maintenance Bay
6 Inch High Rear Cross-Connect Chassis or Panel
Page 2-20
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
Equipment Cable Routing
Cables are routed vertically down the sides of each bay from the overhead cable racking
3.16
(or up the sides of each bay in computer floor applications). When using the recommended
unequal flange or network type racks, the vertical cabling is contained within the duct area of the
racks. At each DSX chassis or panel level, cables are routed across each chassis or panel to the
appropriate termination position. On rear cross-connect bays, the network element cables must
be routed as to not interfere with cross-connect jumper routing.
J. Cross-Connect Cabling
Cross-Connect Types and Lengths
The recommended type of cross-connect jumpers for DSX-3 Systems is 75 ohm coaxial.
3.17
The DSX cross-connect jumpers also add to digital signal level losses. To assure reliable signal
levels, maximum cross-connect jumper lengths shown in Table 2-8 for the various types of
coaxial cables should not be exceeded.
Cross-Connect Routing
Figure 2-15 defines the recommended method of routing cross-connect jumpers. The
3.18
rules shown in the figure will assure minimal cable congestion, optimal traceability and ease of
installation and maintenance.
Vertical Cross-Connect Jumper Hardware
Most DSX-3 chassis and panels are equipped with vertical jumper rings sized for
3.19
maximum sized jumpers that require 5 or 10" spacing between bays. When designing high
density DSX Systems using small diameter coaxial cable and jumpers, bay spacing requirements
may be reduced and smaller sized jumper rings are required. Vertical rings that attach to the rack
may be purchased when configuring skeleton bays that are equipped with all the initial hardware
(vertical and horizontal jumper rings and troughs and fuse panel) but not initially equipped with
DSX chassis or panels. Determine if smaller vertical rings are required, and verify they will fit
within the spacing selected and handle the maximum number and type of cross-connect jumpers
used in the DSX-3 System.
Horizontal Cross-Connect Jumper Hardware
Two horizontal cross-connect jumper wireways are recommended for each DSX bay.
3.20
The upper cable trough is located at the top of the bay (above the fuse panel on front crossconnect so the alarm indicator is visible), and the lower cable trough is located at the bottom of
the bay. Placement of a cable trough in the middle of a bay is not recommended because of the
jumper cross over congestion. Size of the wireways depend on the quantity and size of jumpers
in the maximum DSX lineup. Using worksheet 6 as shown in Figure 2-16 and Table 2-9,
calculate the horizontal wireway size to be provided with the DSX bays.
Page 2-21
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
BAY 1
BAY 2
BAY 3
HORIZONTAL
JUMPER
WIREWAYS
CROSSCONNECT
JUMPER
D
E
B
A
VERTICAL
JUMPER
WIREWAYS
C
C
B
HORIZONTAL
JUMPER
WIREWAYS
A
D
F
1860-D
ROUTING RULES
A. All jumpers in the left-hand side of the cross-connect field should enter and
leave the bay from the left vertical wireways.
B. All jumpers in the right-hand side of the cross-connect field should enter
and leave the bay from the right vertical wireways.
C. All intrabay cross-connects should use the vertical rings except when
terminations are in the same panel.
D. All interbay cross-connects should use the horizontal wireways.
E. All jumpers originating in the upper half of the cross-connect field should
route via the upper horizontal wireways.
F. All jumpers originating in the lower half of the cross-connect field should
route via the lower horizontal wireways.
Figure 2-15. Typical DSX Cross-Connect Rounting
Page 2-22
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
WORKSHEET 6
CALCULATION OF DSX-3 HORIZONTAL WIREWAY DIMENSIONS
A. Number of terminations per chassis or panel
_____
____24
B. Number of chassis or panels per bay
10
_________
C. Number of bays per lineup
6
_________
D. Total number of terminations (A x B x C)
1440
_________
E. Each cross-connect has 2 terminations (D / 2)
720
_________
F. Half the cross-connects use upper wireway and
half use lower wireway (E / 2)
360
_________
G. Peak pileup at any one point expected to be no more than
50% of total cross-connects (F x .50)
180
_________
H. Number of cross-connects per square inch of wireway
(see Table 2-9) (G / number of cross-connects per square
inch)
18.0 sq in
_________
10 (using 735A)
I. Recommended wireway size to be equal or greater than
item H, i.e.
5 x 6 = 30 sq in
_________
5 x 6 = 30 sq in
5 x 8 = 40 sq in
1861-A
Figure 2-16. Example of Completed Worksheet 6
Table 2-9. Quantity of Cross-Connect Jumpers per Square Inch of Wireway
NUMBER OF
CROSS-CONNECT
JUMPERS
TYPE OF CROSS-CONNECT JUMPER
(TWO SINGLE OR ONE DUAL JUMPER)
PER SQUARE INCH OF HORIZONTAL CABLE TROUGH
735A With Messenger
10
Triax
10
RG59 With Messenger
5
Page 2-23
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
K. Assignment of Network Elements
Uniform distribution of network elements across the DSX bay lineup(s) is essential in
3.21
minimizing long interbay cross-connections and resultant cable congestion. Figure 2-17 shows
an example of how different network elements could be spread across a number of bays. Two
rules should be followed in assigning these terminations:
(a)
Provide an appropriate mix of transmission facilities and multiplexers in each bay. An
entire bay of multiplexers will need to be cross-connected to facilities in other bays,
resulting in 100% of cross-connects leaving the bay.
(b)
After distributing different network elements across the bays, administer cross-connect
assignments to ensure the shortest possible cross-connect and retain cross-connects
within a bay whenever possible.
FIBER OPTIC
TRANSMISSION
FACILITIES
RADIO
TERMINAL
EQUIPMENT
BAY
MULTIPLEXERS
1
2
3
4
1862-C
Figure 2-17. Typical Uniform Distirbution Across Bay Lineup
Page 2-24
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
L. Final System Design
All information has now been assembled for final design of the DSX-3 System. Using
3.22
worksheets 1 through 6 (in Section 6) lay out each bay showing the exact placement of all
identified chassis, panels and hardware. Be sure to include equipment for current needs as well
as reserving space for future requirements.
The main system design considerations for DSX-3 Systems are summarized in
3.23
Table 2-10. When recommended rules and layouts are followed, the end product will be a DSX-3
System which is easy to install, use and maintain. The system will also be easily expandable, and
meet the needs of the office for many years.
Table 2-10. DSX-3 Design Considerations
1.
Unequal flange or network racks are recommended for the efficient management of IN/OUT
equipment cables.
2.
When using racks taller than 7 feet, rack spaces above the 7-foot level are not used for DSX.
This eliminates the need for ladders when circuit access or maintenance is required.
3.
Spacing between bays and at lineup ends may be required depending on the quantity and type
of coaxial cable entering the bays. When spacing bays 0, 5 or 10 inches, verify that vertical
jumper rings will fit between bays.
4.
Fuse panels should be placed in the upper most part of the bay, above the horizontal wireway
on rear cross-connect bays and below the horizontal wireway on front cross-connect bays.
5.
An upper and lower horizontal wireway should be provided in each bay.
6.
Horizontal wireways should be sized according to calculations in work sheet 6.
7.
Horizontal wireways should be at the same height in each bay throughout the lineup.
8.
Cross aisle panels should be provided, or space reserved, in each bay unless there will never
be more than one lineup in the central office.
9.
10.
Maintenance bays should be located at every third bay position throughout the lineup.
Maximum equipment cables and cross-connect jumper electrical lengths should not be exceeded.
Page 2-25
© 1996, ADC Telecommunications, Inc.
INSTALLATION
ADCP-80-323
1st Edition, Issue 2, December 1996
SECTION 3
INSTALLATION
Contents
Page
1. GENERAL ........................................................................... 3-1
2. OFFICE REQUIREMENTS ............................................................... 3-1
A.
Space and Floor Loading ............................................................ 3-1
B.
Environment...................................................................... 3-3
3. UNPACKING AND INSPECTION .......................................................... 3-4
4. HARDWARE INSTALLATION ............................................................ 3-4
A.
Bay Positioning and Mounting ........................................................ 3-4
B.
Chassis, Module and Panel Positioning and Mounting ..................................... 3-4
5. SYSTEM WIRING AND CABLING ......................................................... 3-5
A.
Power Wiring ..................................................................... 3-5
B.
Fuse Panels ...................................................................... 3-5
C.
DSX Chassis, Modules and Panels .................................................... 3-5
D.
Cabling and Cross-Connect Wiring .................................................... 3-7
E.
Cross-Aisle Panel Cabling ........................................................... 3-9
F.
Interbay Patch Panel Cabling ........................................................ 3-11
G.
Cross-Connect Cabling ............................................................ 3-11
1. GENERAL
This section provides complete instructions for installing the DSX System. Included are
1.01
office requirements and procedures for mounting, cabling and wiring all modules and bays. It is
recommended that the entire section be read and understood before beginning installation. A
typical DSX-3 drop-in bay installation is shown in Figure 3-1.
2. OFFICE REQUIREMENTS
2.01
Office conditions required by the DSX System are as follows.
A. Space and Floor Loading
The DSX System consists of various chassis, modules and panels mounted in one or
2.02
more 19- or 23-inch equipment racks. The height of the racks may be 7, 9 or 11.5 feet. Maximum
dimensions of DSX bays are shown in Tables 3-1 and 3-2. Approximate dimensions of the
specific system purchased may be ascertained by examination of the system design as shown in
ADC’s DSX Catalog. A fully configured DSX bay may weigh up to 525 pounds (239 kg).
Page 3-1
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
BLOWN FUSE
INDICATOR
USE
3 AMP
FUSE
MAXIMUM
50 AMP
MAXIMUM
TOTAL BUSS
AMPERAGE
DANGER
4
8
12
16
CKT
X-OUT
1-10
NEG (-)
11-20
REMOTE ALARMS
1-10
POS (+)
11-20
NEG (–)
BUS
GND
X-IN
– 48V
ONLY
CKT
13
1
14
2
15
3
16
4
17
5
18
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
X-IN
X-OUT
X-IN
X-OUT
X-IN
X-OUT
X-IN
X-OUT
X-IN
X-OUT
X-IN
6
19
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
CKT
X-OUT
8
21
CKT
X-IN
7
20
CKT
X-OUT
6
19
CKT
X-IN
8
21
CKT
X-OUT
7
20
CKT
X-IN
6
19
CKT
X-OUT
8
21
CKT
X-IN
7
20
CKT
X-OUT
6
19
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
18
19
20
5
6
7
8
21
9
22
10
23
11
24
12
8666-A
Figure 3-1. Typical DSX-3 Drop-In Bay Installation
Page 3-2
© 1996, ADC Telecommunications, Inc.
POS (+)
BUS
8665-A
ADCP-80-323
1st Edition, Issue 2, December 1996
Table 3-1. Maximum Dimensions for 19-Inch Bay
TYPE
Channel
UnequaL
Flange
HEIGHT
WIDTH
DEPTH
7.0 ft
(2.1 m)
20.31 in
(51.59 cm)
15.0 in
(38.1 cm)
9.0 ft
(2.7 m)
20.31 in
(51.59 cm)
15.0 in
(38.1 cm)
11.5 ft
(3.5 m)
20.31 in
(51.59 cm)
15.0 in
(38.1 cm)
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Table 3-2. Maximum Dimensions for 23-Inch Bay
TYPE
Channel
Unequal
Flange
Network
HEIGHT
WIDTH
DEPTH
7.0 ft
(2.1 m)
24.3 in
(61.7 cm)
15.0 in
(38.1 cm)
9.0 ft
(2.7 m)
24.3 in
(61.7 cm)
15.0 in
(38.1 cm)
11.5 ft
(3.5 m)
24.3 in
(61.7 cm)
15.0 in
(38.1 cm)
7.0 ft
(2.1 m)
26.4 in.
(67.1 cm)
15.0 in
(38.1 cm)
9.0 ft
(2.7 m)
26.4 in.
(67.1 cm)
15.0 in
(38.1 cm)
11.5 ft
(3.5 m)
26.4 in.
(67.1 cm)
15.0 in
(38.1 cm)
7.0 ft
(2.1 m)
25.9 in
(65.8 cm)
12.0 in.
(30.5 cm)
9.0 ft
(2.7 m)
25.9 in
(65.8 cm)
12.0 in.
(30.5 cm)
11.5 ft
(3.5 m)
25.9 in
(65.8 cm)
12.0 in.
(30.5 cm)
B. Environment
Operational
The DSX System will operate in any ambient temperature and humidity within the
2.03
following ranges:
(a)
Temperature: 0° C (+32° F) to +50° C (+122° F).
(b)
Humidity: 5% to 95% relative humidity without condensation.
Page 3-3
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
Shipping and Storage
The DSX System can be shipped and stored in any ambient temperature and humidity
2.04
within the following ranges:
(a)
Temperature: –40° C (–40° F) to +70° C (+168° F).
(b)
Humidity: 5% to 95% relative humidity without condensation.
3. UNPACKING AND INSPECTION
Caution: A crated DSX bay may weigh as much as 700 pounds, depending on its size
and configuration. An adequately rated and secured block and tackle or overhead hoist
must be used while uncrating, positioning and securing each bay.
Remove all items from their shipping containers. Each chassis, module and panel
3.01
includes a separate package of parts. Verify that all parts on the packing slip have been received
beforeshipping containers are discarded. If there are any damaged or missing parts, file a claim
with the commercial carrier and notify ADC.
4. HARDWARE INSTALLATION
A. Bay Positioning and Mounting
Set each DSX bay in its assigned position. Secure each bay to the floor and to adjacent
4.01
bays or frames, using spacers between bays where specified by system design. If overhead
support is required, secure the bays to the overhead supports using appropriate hardware.
B. Chassis, Module and Panel Positioning and Mounting
The package of loose parts contains mounting brackets, cable rings, designation strips,
4.02
installation drawing, etc. Place mounting brackets on the chassis, modules or panels and install
them in their assigned bay position using 12–24 × 1/2 inch mounting screws. The remaining parts
should then be placed as shown on the installation drawing.
Some chassis/panels have optional mounting positions. Choose the best mounting option
4.03
for the environment and type of equipment rack used (e.g., 2-inch recessed mounting for rear
cross-connect in duct-type rack). Mounting options are also provided to allow for mounting of
chassis/panels in different types of equipment racks and still maintain alignment of vertical cable
rings with horizontal wireways. Install rear vertical chassis-mount cable rings after each chassis/
panel is installed in the rack.
Page 3-4
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
5. SYSTEM WIRING AND CABLING
Wiring and cabling the DSX System into the office requires connection of office power
5.01
and ground, wiring of cross-aisle and interbay patching panels, cabling of network element
input/output circuits, and installation of all cross-connect jumpers. The following paragraphs
give procedures for installing all wiring and cabling, although some drop-in (module) bays are
shipped with all intrabay wiring installed.
Caution: All DSX wiring and cabling should be connected with the system office battery
input off or disconnected at the office distribution panel.
A. Power Wiring
The DSX System operates on –48 Vdc filtered office battery, fused or breakered at the
5.02
office distribution panel. Current requirements can be calculated based on .008 Amps maximum
per flashing LED.
The number of LEDs or lamps lit at any one time will depend on local patching and
5.03
testing procedures. It is recommended that each DSX chassis, module or panel be fused at the
fuse panel with a 0.5 amp fuse and connected to the fuse panel using 22 AWG solid tinned
copper wire. Terminal spades should be used for connection to the screw terminals.
B. Fuse Panels
Drop-in (module) bays are normally equipped with a fuse panel located at the top. A
5.04
typical terminal strip mounted on the rear of the fuse panel is shown in Figure 3-2.
ADC fuse panel busses are typically rated at 50 to 70 Amps. The size of the feeder wires
5.05
between the fuse panel and the office battery should be calculated based on anticipated overall
power requirements of the bay and use of the fuse panel (6 AWG conductors are generally used).
(a)
Connect the –48 Vdc office battery to the NEG(—) BUS terminal on the fuse panel.
(b)
Connect the office battery ground (–48V battery return) to the POS(+) BUS terminal on
the fuse panel.
The normally open REMOTE ALARM terminals at the back of the fuse panel provide a
5.06
closed loop (in alarm state) for connecting fuse failure alarm circuitry to an external alarm
system. The alarm will be triggered upon failure of any fuse in the fuse panel. Each GMT type
fuse has a colored tab which is displayed when the fuse is blown, and the fuse panel has a LED
indicator which lights when any fuse on the panel is blown.
C. DSX Chassis, Modules and Panels
A typical DSX chassis power terminal strip is shown in Figure 3-3. The lowest
5.07
chassis/panel in the rack is typically wired to fuse position 1, and then each successive
chassis/panel up the rack wired to successive fuse positions 2, 3, 4, etc. Connect each DSX
chassis or panel to the fuse panel as follows:
Page 3-5
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
(a)
DSX-3 Chassis
(1) Connect the –48 Volt terminal on the chassis to a NEG (–) distribution terminal on
the fuse panel.
(2) Connect the GND terminal on the chassis to the corresponding POS (+) distribution
terminal on the fuse panel.
(3) Connect chassis ground to the office grounding system. The chassis ground is often
grounded to the equipment rack which in turn is connected to the office grounding
system.
(b)
DSX-3 Panels
(1) Connect the –48 Volt lamp terminal of the first circuit on the DSX panel to a NEG (–)
distribution terminal on the fuse panel.
(2) Connect the ground terminal of the first circuit on the DSX panel to the
corresponding POS (+) distribution terminal on the fuse panel.
Note: Each DSX panel, as purchased, has all –48 Volt lamp terminals multipled together
and ground terminals multipled together.
TERMINAL BLOCK FOR
INTRABAY POWER WIRING
1 2 3 4 5 6 7 8 9 10
A
B
C
D
E
F
TERMINAL STRIP FOR OFFICE
POWER WIRING
1-10
11-20 NEG (-)
REMOTE ALARM
1-10
11-20 POS (+)
NEG (-)
BUS
POS (+)
BUS
-48 V
ONLY
1883-A
Figure 3-2. Drop-In (Module) Bay Fuse Panel Terminal Strip
48V
LAMP
-48V
POWER
GND
CHAS
GND
CHAS
GND
1972-A
Figure 3-3. Typical DSX Module Power Terminal Strip
Page 3-6
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
D. Cable and Cross-Connect Wiring
Installation Drawings
Each chassis, module and panel is shipped with an installation drawing. This drawing
5.08
defines the specific input/output and cross-connect terminals/connectors wired to each DSX
circuit and front-panel jack.
Figure 3-4 shows typical installation data included on each DSX-3 installation drawing.
5.09
This drawing is for a 12-circuit panel as can be seen in the front view. A schematic diagram and
side view of one of the twelve identical circuits is also shown in the figure, which identifies all
corresponding input, output and cross-connect points.
Office Equipment and Facility Cabling
DSX Systems are wired to the office equipment by means of coaxial cables at the back
5.10
of each bay. All cabling should be in accordance with the rules defined in the System Design
section of this Application Guide. Typical DSX-3 cabling is shown in Figure 3-5.
If the cables are coming into the bay from above, cable attachment should start with
5.11
panels/modules at the bottom of the bay and work up. If the cables are coming in from below,
cable attachment should begin at the top. This provides the most orderly cable arrangement
within the vertical duct area.
All cables should be secured with lacing twine or nylon tie wraps to brackets in the duct
5.12
area of unequal flange or network racks, or to tie brackets on the rear of channel racks. A sixinch service loop should be left before the cable is tied to the panel/ chassis. The cables are
secured to the panel/chassis by means of the rear cable tie bracket.
Using cables, connect the network elements to their designated DSX input/output
5.13
positions. The cables connect to BNC or TNC coaxial connectors. Typical connections are
defined in the installation drawing accompanying each module/panel (see Figure 3-4).
Terminate each coaxial cable to one IN BNC/TNC connector for each network element
5.14
input circuit, and one OUT BNC/TNC connector for each output circuit. Terminate the output
(XMT) of a network element to the OUT connector of the DSX-3; and input (RCV) of a network
element to the IN connector of the DSX-3 (as shown in Figure 3-6). Record each connection on
the corresponding designation strips or cards.
Page 3-7
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
TRACER LAMP
TRACER LAMP PIN JACK
LAMP SWITCH
CKT
CKT
12
DUMMY PIN JACK
TL
TL
MON
MON
X-OUT
X-OUT
X-IN
X-IN
OUT
OUT
IN
IN
–48V MULTIPLE
TRACER LAMP
–48V RED
FLASHING LED
LAMP SWITCH
GROUND
MULTIPLE
TRACER LAMP
JACK PIN
MON
R3
X-OUT
R1
X-IN
OUT
OUT
R2
IN
IN
R2
LAMP AND
LAMP SWITCH
TL PIN JACK
MON
X-OUT
X-IN
OUT
IN
1887-A
Figure 3-4. Typical Information Shown on DSX-3 Installation Drawings
Page 3-8
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
1
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
MON
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
X-O
3
4
5
6
7
8
18
19
20
21
2
9
10
11
12
13
14
15
16
17
22
23
24
5913-A
Figure 3-5. Typical DSX-3 Cabling
XMIT
OUT
OUT
DS3
NETWORK
ELEMENT
DSX-3
RCV
IN
IN
2242-B
Figure 3-6. Newtork Element-To-DSX-3 Connection
E. Cross-Aisle Panel Cabling
Using coaxial cables between lineups in DS3 multi-lineup systems, interconnect the
5.15
cross-a!isle panels on corresponding bays in each lineup. Typically, these cross-aisle ties are
routed through I/O repeaters for regeneration of DS3 signals. Connect the cables to the
BNC/TNC connectors on the cable side of the cross-aisle panels as shown in Figure 3-7. The tie
cables between two cross aisle panels are wired so that outputs on one panel are wired to the
inputs of the other panel.
Note: In rear cross-connect systems, the cross-aisle panel is mounted on the rear of
equipment racks and tie cables are routed through standoff rings to the front side of the
cross-aisle panel.
In double lineups, connect all cross-aisle panel connectors in one lineup to the
5.16
corresponding cross-!aisle panel connectors in the other lineup. In triple lineups, interconnect
half of the cross-aisle connectors to half of the cross-aisle connectors on each of the other two
lineups. Figure 3-8 and 3-9 show cross-aisle panel cabling in typical multi-lineup systems.
Page 3-9
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
COAXIAL
CROSS-CONNECT
JUMPER
OUT
OUT
DS3
NETWORK
ELEMENTS
COAXIAL
CROSS-CONNECT
JUMPER
COAXIAL TIE CABLES
OUT
OUT
CROSS
AISLE
PANEL
DSX-3
CROSS
AISLE
PANEL
DS3
NETWORK
ELEMENTS
DSX-3
IN
IN
IN
IN
NON REPEATERED CROSS AISLE PANEL WIRING
COAXIAL
CROSS-CONNECT
JUMPER
COAXIAL
TIE
CABLES
OUT
DS3
NETWORK
ELEMENTS
OUT
OUT
CROSS
AISLE
PANEL
DSX-3
IN
OUT
OUT
CROSS
AISLE
PANEL
DUAL I/O
REPEATER
IN
IN
COAXIAL
CROSS-CONNECT
JUMPER
COAXIAL
TIE
CABLES
DS3
NETWORK
ELEMENTS
DSX-3
IN
IN
OUT
IN
REPEATERED CROSS AISLE PANEL WIRING
1888-B
Figure 3-7. Typical Cross-Aisle Panel Connections
LINEUP
1
1
2
3
4
5
6
7
8
9
LINEUP
2
1
2
3
4
5
6
7
8
9
LINEUP
3
1
2
3
4
5
6
7
8
9
1889-A
Figure 3-8. DSX-3 Cross-AIsle Panel Direct Cabling in Triple Lineup System
Page 3-10
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
ZONE 1
ZONE 2
LINEUP
1
1
2
3
4
5
6
7
8
LINEUP
2
1
2
3
4
5
6
7
8
LINEUP
3
1
2
3
4
5
6
7
8
1890-A
Figure 3-9. DSX-3 Cross-Aisle Panel Two-Zone Cabling in Triple Lineup System
F. Interbay Patch Panel Cabling
Interconnect all interbay patching panels using cables to BNC or TNC connectors at the
5.17
back of each panel. Interbay patching panels are normally located in maintenance bays within
DSX-3 lineups. Interpanel cabling is shown in Figure 3-10. Point-to-point cabling is used with
circuits dedicated to other maintenance bays as shown in Figure 3-11. Interbay patch circuits
between lineups may require I/O repeaters if the total patch length between DSX positions
exceeds their limit (27 feet for RG-59 cable). The tie cables between interbay patch panels are
wired so that outputs on one panel are wired to the inputs of the other panel as shown in
Figure 3-10.
G. Cross-Connect Cabling
Cross-connect jumpers should be routed as shown in Figure 3-12. Whenever a cross5.18
connect changes direction, it should do so at a point where a ring, tray or fanning strip is placed.
This will allow the cross connect to be dressed neatly with no strain and without interfering with
any other portion of the bays. All cross-connect jumpers should use the horizontal cableways
between bays, and the vertical cableways within the bay. To prevent unnecessary jumper buildup
and congestion, all discontinued cross connects should be removed from the DSX cableways.
Jumpers should be sized to the exact length whenever possible, and any excess jumper length
should be stored outside the wireways.
Figure 3-13 shows DSX-3 modules with cross connects in place. Cable congestion is
5.19
held to a minimum if all recommendations are carefully followed. This not only simplifies
installation, but also provides for quick wire traceability and easy DSX expansion and
maintenance.
Page 3-11
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
Using 75-ohm coaxial cables and accompanying messenger wires, cross connect DSX-3
5.20
circuits as shown in Figure 3-14. Terminal identification is as shown in the installation drawing
accompanying each module/panel. Front cross-connect cables are equipped with midsize or
standard coaxial plugs, and rear cross-connect cables are equipped with BNC or TNC coaxial
connectors. Front cross-connect chassis/panels have retainer clips for each connection to ensure
plugs are not accidentally pulled out. Rear cross-connect chassis/panels employ BNC connectors
with a locking feature or TNC connectors with a threaded connection to ensure against accidental
removal.
(a)
Connect the cross-connect out (XO) of the first termination to the cross-connect in (XI)
of the second termination. Connect the messenger wire pins of this cross connect to
either pin jack on each termination.
(b)
Connect the cross-connect in (XI) of the first termination to the cross-connect out (XO)
of the second termination. Connect the messenger wire pins of this cross connect to the
remaining pin jack on each termination.
ADC DSX-3 cross-connect cords are available in various lengths from 1 to 27 feet.
5.21
Cross-connect cords are also available with one connector or plug attached and the other
connector or plug furnished unattached. These single-ended cords can be cut to the exact length
required, which will reduce cross connect congestion.
Disconnect any discontinued cross-connect jumper at each end and remove them from
5.22
the wireways. The coaxial connectors or plugs and messenger pins should be left intact for reuse.
COAXIAL
PATCH CORDS
OUT
OUT
DS3
NETWORK
ELEMENTS
COAXIAL
PATCH CORDS
COAXIAL TIE CABLES
OUT
INTERBAY
PATCH
PANEL
DSX-3
OUT
INTERBAY
PATCH
PANEL
DS3
NETWORK
ELEMENTS
DSX-3
IN
IN
IN
IN
1894-A
Figure 3-10. Interbay Patch Panel Wiring
Page 3-12
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
24 CIRCUITS
LINEUP
1
1
2
3
4
5
6
MTCE
7
8
9
6
MTCE
7
8
9
6
MTCE
7
8
9
6
MTCE
7
8
9
6
MTCE
7
8
9
6
MTCE
7
8
9
SINGLE LINEUP
8 CIRCUITS
LINEUP
1
1
MTCE
3
2
4
8 CIRCUITS
8 CIRCUITS
LINEUP
2
1
MTCE
3
2
5
4
5
DOUBLE LINEUP
4 CIRCUITS
LINEUP
1
1
MTCE
3
2
4
4 CIRCUITS
4 CIRCUITS
LINEUP
2
1
2
MTCE
3
4
1
2
MTCE
3
5
4 CIRCUITS
4 CIRCUITS
LINEUP
3
5
4
5
TRIPLE LINEUP
NOTE: REPEATERS BETWEEN
LINEUPS ARE NOT SHOWN.
1895-A
Figure 3-11. Typical DSX-3 Bay Arrangements Showing Interbay Patch Panel Cabling
Page 3-13
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
BAY 1
BAY 2
BAY 3
HORIZONTAL
JUMPER
WIREWAYS
CROSSCONNECT
JUMPER
D
E
B
A
VERTICAL
JUMPER
WIREWAYS
C
C
B
HORIZONTAL
JUMPER
WIREWAYS
A
D
F
1860-D
ROUTING RULES
A. All jumpers in the left-hand side of the cross-connect field should enter and
leave the bay from the left vertical wireways.
B. All jumpers in the right-hand side of the cross-connect field should enter
and leave the bay from the right vertical wireways.
C. All intrabay cross-connects should use the vertical rings except when
terminations are in the same panel.
D. All interbay cross-connects should use the horizontal wireways.
E. All jumpers originating in the upper half of the cross-connect field should
route via the upper horizontal wireways.
F. All jumpers originating in the lower half of the cross-connect field should
route via the lower horizontal wireways.
Figure 3-12. Recommended Cross-Connect Routing
Page 3-14
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
CKT
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
X-IN
X-OUT
X-IN
11
24
CKT
X-OUT
12
X-OUT
X-IN
CKT
13
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
8661-A
Figure 3-13. Typical DSX-3 Cross-Connect Wiring (Rear Cross-Connect Shown)
DSX 4-H
CIRCUIT MODULE
(REAR VIEW)
TRACER LAMP
PIN JACKS
TRACER LAMP
PIN JACKS
TL
TL
XO
XO
OUT
OUT
CROSS
CONNECTS
XI
XI
IN
IN
O
O
OUT
I
OUT
I
IN
IN
TRIAX CORD (OR EQUIVALENT)
WITH MESSENGER WIRE
8638-A
Figure 3-14. DSX-3 Cross Connection
Page 3-15
© 1996, ADC Telecommunications, Inc.
OPERATION
ADCP-80-323
1st Edition, Issue 2, December 1996
SECTION 4
OPERATION
CONTENTS
1.
PAGE
GENERAL ........................................................................... 4-1
PROCEDURE 1: CROSS-CONNECT CIRCUIT IDENTIFICATION .................................. 4-2
PROCEDURE 2: DIGITAL OFFICE EQUIPMENT TEST ......................................... 4-3
PROCEDURE 3: IN-SERVICE PATCHING TO BYPASS A FAILED FACILITY ......................... 4-4
PROCEDURE 4: IN-SERVICE ROLL OVER TO NEW FACILITY ................................... 4-6
PROCEDURE 5: OUT- OF-SERVICE PATCHING TO BYPASS A FAILED FACILITY .................... 4-8
PROCEDURE 6: OUT- OF-SERVICE TRAFFIC PATTERN CHANGES.............................. 4-9
PROCEDURE 7: RESTORATION OF SERVICE VIA INTERMEDIATE SITE.......................... 4-10
PROCEDURE 8: INTERBAY PATCHING BY MEANS OF SHORT PATCH CORDS ..................... 4-11
1. GENERAL
This section presents step-by-step procedures for using the DSX-3 Cross-Connect
1.01
System. Each procedure includes:
(a)
A brief description of the procedure and its purpose.
(b)
A general schematic illustration of the procedure.
(c)
Steps to perform the procedure.
If problems are encountered in performing any of these procedures contact ADC
1.02
Telecommunications as described in the General Information section — Customer Support
Services.
Page 4-1
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
PROCEDURE 1
CROSS-CONNECT CIRCUIT IDENTIFICATION
This procedure is used to identify the equipment terminated at the opposite end of a crossconnect jumper.
STEP
1
2
3
PROCEDURE
Pull the DSX lamp switch (LS) button for the known equipment termination.
Observe all tracer lamps. The tracer lamp for the known equipment termination,
and the tracer lamp for the unknown cross-connected equipment termination,
will both flash for approximately 30 seconds and then remain lit.
Push lamp switch back in to extinguish tracer lamps after use.
X-O/
X-I
X-O/
X-I
LAMP
SWITCH
GND
-48V
LAMP
SWITCH
GND
-48V
MESSENGER
CORD
X-IN
X-IN
X-OUT
X-OUT
MON
MON
OUT
OUT
IN
IN
OUT
KNOWN
EQUIPMENT IN
OUT
UNKNOWN
IN EQUIPMENT
1280-B
Page 4-2
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
PROCEDURE 2
DIGITAL OFFICE EQUIPMENT TEST
This procedure is used to test two digital office equipment units cabled together at the crossconnect system. The units can be tested either with or without interruption of the circuit crossconnect.
STEP
PROCEDURE
1
To test a circuit at the cross-connect point of the two equipment units without interrupting the
cross-connect circuit, plug the appropriate test unit into the desired MON jack and perform the
tests.
2
To open a cross-connect circuit (this will interrupt any active circuits between EQPT A and
EQPT B) and test an equipment unit output which is cabled to the cross-connect system, plug
the appropriate test unit into the OUT jack of the circuit to be tested.
3
To open a cross-connect circuit (this will interrupt any active circuits between EQPT A and
EQPT B) and test an equipment unit input which is cabled to the cross-connect system, plug
the appropriate test unit into the IN jack of the circuit to be tested.
4
Remove test equipment patch cords after testing is complete.
X-O/
X-I
X-O/
X-I
MESSENGER
CORD
PERMANENT
CROSS-CONNECT
JUMPERS
LAMP
SWITCH
GND
-48V
LAMP
SWITCH
GND
-48V
X-IN
X-IN
X-OUT
X-OUT
MON
MON
OUT
OUT
OUT
EQPT
A
IN
OUT
IN
IN
EQPT
B
IN
TEST
EQUIPMENT
1281-B
Page 4-3
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
PROCEDURE 3
IN-SERVICE PATCHING TO BYPASS A FAILED FACILITY
This procedure is used to restore service on a failed circuit without interrupting service when
patches are installed and removed. This illustration represents the near end office. A similar
corresponding far end office patch must also be performed, but is not shown.
STEP
PROCEDURE
1
Select a standby facility to which communication between the two interrupted sites will
be rerouted.
2
At both sites interrupted by the damaged facility, patch the office equipment to standby facility
using patch cords as follows:
(a) Connect the office equipment MON jack ① to a bridging repeater IN jack ②.
(b) Connect the bridging repeater OUT ③ jack to the standby facility IN jack ④.
Perform steps 2(a) and 2(b) at corresponding far end office before proceeding.
(c) Connect the standby facility MON jack ⑤ to a bridging repeater IN jack ⑥.
(d) Connect the bridging repeater OUT jack ⑦ to the office equipment INjack ⑧.
Perform steps 2(c) and 2(d) at corresponding far end office before proceeding.
3
Insert a 75 ohm terminating plug into the standby facility OUT jack ⑨.
4
Insert a 75 ohm terminating plug into the office equipment OUT jack ⑩.
Perform steps 3 and 4 at corresponding far end office.
5
Service is now temporarily restored between the interrupted sites.
6
After the failed facility is repaired, remove patch cords in reverse order as follows:
7
Warning: Reverse order must be followed exactly to avoid interruption when
removing in-service patch!
Remove the 75 ohm termination plug from the office equipment OUT jack ⑩.
8
Remove the 75 ohm termination plug from the standby facility OUT jack ⑨.
Perform steps 7 and 8 at corresponding far end office before proceeding.
9
(a) Remove office equipment IN jack ⑧ to bridging repeater OUT jack ⑦.
(b) Remove bridging repeater IN jack ⑥ to standby facility MON jack ⑤.
Perform steps 9(a) and 9(b) at corresponding far end office before proceeding.
(c) Remove standby facility IN jack ④ to bridging repeater OUT jack ➆.
(d) Remove bridging repeater IN jack ② to office equipment MON jack ①.
Perform steps 9(c) and 9(d) at corresponding far end office.
Page 4-4
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
X-O/
X-I
LAMP
SWITCH
GND
-48V
X-O/
X-I
MESSENGER CORD
EXISTING CROSS-CONNECT
JUMPERS
X-IN
X-IN
X-OUT
LAMP
SWITCH
GND
-48V
X-OUT
1
MON
OFFICE
EQUIPMENT
MON
TERM
PLUG
OUT
OUT
OUT
10
IN
IN
IN
OUT
IN
FAILED
FACILITY
8
PATCH
CORD
X-O/
X-I
LAMP
SWITCH
GND
-48V
X-IN
3
OUT
2
IN
OUT
IN
TERM
PLUG
X-OUT
5
MON
OUT
9
IN
7
BRIDGING
REPEATERS
6
OUT
IN
STANDBY
FACILITY
4
8798-A
Page 4-5
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
PROCEDURE 4
IN-SERVICE ROLL OVER TO NEW FACILITY
This procedure is used to rearrange working circuits without interrupting service when patches
are installed and removed. This illustration represents the near end office. A similar
corresponding far end office patch must also be performed, but is not shown.
STEP
PROCEDURE
1
Select the equipment that is to be rolled over to new facility.
2
At both sites patch the office equipment to the new facility using patch cords as follows:
(a) Connect the office equipment MON jack ① to a bridging repeater IN jack ②.
(b) Connect the bridging repeater OUT ③ jack to the new facility IN jack ④.
Perform steps 2(a) and 2(b) at corresponding far end office before proceeding.
(c) Connect the new facility MON jack to a bridging repeater IN jack ⑥.
(d) Connect the bridging repeater OUT jack ⑦ to the office equipment IN jack ⑧.
Perform steps 2(c) and 2(d) at corresponding far end office before proceeding.
3
Insert a 75 ohm terminating plug into the standby facility OUT jack ⑨.
4
Insert a 75 ohm terminating plug into the office equipment OUT jack ⑩.
Perform steps 3 and 4 at corresponding far end office.
5
Service is now temporarily patched between the office equipment and new facility.
6
Remove existing cross-connect jumpers between the office equipment and existing facility.
7
Run new cross-connect jumpers between the office equipment and new facility.
Perform steps 6 and 7 at corresponding far end office before proceeding.
8
Remove the rollover patch cords in reverse order.
9
Warning: Reverse order must be followed exactly to avoid an interruption when
removing in-service patch!
Remove the 75 ohm termination plug from the office equipment OUT jack ⑩.
10
Remove the 75 ohm termination plug from the new facility OUT jack ⑨.
Perform steps 9 and 10 at corresponding far end office before proceeding.
11
(a) Remove office equipment IN jack ⑧ to bridging repeater OUT jack ⑦ .
(b) Remove bridging repeater IN jack ⑥ to new facility MON jack ⑤.
Perform steps 11(a) and 11(b) at corresponding far end office before proceeding.
(c) Remove new facility IN jack ④ to bridging repeater OUT jack ③ .
(d) Remove bridging repeater IN jack ② to office equipment MON jack ①.
Perform steps 11(c) and 1(d) at corresponding far end office.
Page 4-6
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
X-O/
X-I
LAMP
SWITCH
GND
-48V
X-O/
X-I
MESSENGER CORD
X-IN
EXISTING CROSS-CONNECT
JUMPERS
X-IN
X-OUT
LAMP
SWITCH
GND
-48V
X-OUT
1
MON
MON
TERM
PLUG
OUT
OUT
OUT
OUT
OFFICE
EQUIPMENT
10
IN
IN
IN
IN
EXISTING
FACILITY
8
PATCH
CORDS
X-0/
X-I
LAMP
SWITCH
GND
-48V
X-IN
NEW
CROSS-CONNECT
JUMPERS
3
OUT
2
IN
OUT
IN
X-OUT
5
MON
TERM
PLUG
OUT
9
IN
7
BRIDGING
REPEATERS
OUT
IN
NEW
FACILITY
4
6
PATCH
CORDS
8799-A
Page 4-7
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
PROCEDURE 5
OUT-OF-SERVICE PATCHING TO BYPASS A FAILED FACILITY
This procedure is used to bypass a failed facility without the use of bridging office repeaters. It is
recommended that Procedure #3 “In Service Patching” be used whenever possible to ensure
service is not interrupted when removing patch cords while restoring the circuit. This illustration
represents the near end office. A similar corresponding far end office patch must also be
performed but is not shown.
STEP
1
2
PROCEDURE
Select a standby facility to which communication between the two interrupted sites will be
routed.
At both sites interrupted by the damaged facility, patch the office equipment to standby facility
using patch cords as follows:
(a) Connect the office equipment OUT jack ① to standby facility IN jack ②.
(b) Connect the standby facility OUT ③ to office equipment IN jack ④.
3
Perform steps 2(a) and 2(b) at corresponding far end office before proceeding.
Service is now temporarily restored between the interrupted sites.
Warning: Service may again be momentarily interrupted when removing patch cords.
4
After the failed facility is repaired, remove all patch cords to restore service between the
interrupted sites.
X-O/
X-I
X-O/
X-I
LAMP
SWITCH
GND
-48V
LAMP
SWITCH
GND
-48V
X-IN
X-IN
X-OUT
X-OUT
MON
MON
OUT
1
OUT
OUT
OFFICE
EQUIPMENT
OUT
IN
IN
IN
4
FAILED
FACILITY
IN
X-O/
X-I
LAMP
SWITCH
GND
-48V
PATCH
CORDS
X-IN
X-OUT
MON
OUT
3
OUT
STANDBY
IN FACILITY
IN
2
8800-A
Page 4-8
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
PROCEDURE 6
OUT-OF-SERVICE TRAFFIC PATTERN CHANGES
This procedure is used to make traffic pattern changes such as those caused by a large corporation
relocating within the limits of the same office.
STEP
PROCEDURE
1
Remove the cross-connect jumpers and messenger wires between the multiplexer and fiber
terminal for the present location.
2
Install cross-connect jumpers and messenger wires between the multiplexer and fiber terminal
for the new location.
3
Record the new office cross-connect arrangement on the DSX-3 designation strips/cards.
X-O/
X-I
X-O/
X-I
LAMP
SWITCH
GND
-48V
LAMP
SWITCH
GND
-48V
2
X-IN
X-IN
X-OUT
X-OUT
MON
MON
OUT
OUT
OUT
MULTIPLEXER
OUT
1
IN
IN
IN
FIBER
TERMINAL
(PRESENT
IN LOCATION)
X-O/
X-I
CROSS-CONNECTS
EXISTING CIRCUIT
CROSS-CONNECTS
NEW CIRCUIT
LAMP
SWITCH
GND
-48V
3
X-IN
X-OUT
MON
OUT
OUT
IN
FIBER
TERMINAL
(NEW
IN
LOCATION)
1285-D
Page 4-9
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
PROCEDURE 7
RESTORATION OF SERVICE VIA INTERMEDIATE SITE
This procedure is used to temporarily restore service between two sites by rerouting circuits
through an intermediate site. This procedure is used when service between the two sites is
damaged (such as would be caused by a cut cable). The illustration shows an “out-of-service”
patching method although “in-service” patching using bridging repeaters at sites A and B may
also be employed.
STEP
PROCEDURE
1
Select a site at which communication between the two interrupted sites will be rerouted
2
At intermediate site C, patch between office A and office B fiber terminals at the DSX jacks
(Patch A OUT to B IN and B OUT to A IN).
3
At sites A and B patch multiplexers to fiber terminals that route through intermediate site C
at the DSX jacks (patch MUX OUT to fiber terminal IN and fiber terminal OUT to MUXIN).
Service is now restored between sites A and B via intermediate site C.
4
After the original facility between sites A and B is repaired, remove patches at sites A and B
and then site C.
Warning: Service may again be momentarily interrupted when removing patch cords.
Using “in-service” patching procedure #3 at sites A and B will ensure service is not
interrupted when removing patch cords
SITE A
SITE B
DSX BAY
DSX BAY
IN
OUT
MON
IN
IN
OUT
MON
OUT
OUT
OUT
MON
FIBER
OPTIC
FACILITY
IN
OUT
OUT
OUT
FIBER
TERMINAL
FIBER
TERMINAL
IN
IN
MUX
IN
IN
BREAK
IN LINE
IN
IN
IN
IN
IN
OUT
OUT
MON
MON
OUT
OUT
PATCH
CORDS
OUT
MON
OUT
OUT
OUT
MUX
IN
OUT
OUT
FIBER
TERMINAL
FIBER
TERMINAL
PATCH
CORDS
IN
IN
IN
IN
FIBER
OPTIC
FACILITY
FIBER
OPTIC
FACILITY
INTERMEDIATE SITE C
DSX BAY
IN
IN
OUT
OUT
MON
MON
OUT
OUT
OUT
FIBER
TERMINAL
OUT
IN
IN
IN
PATCH CORDS
Page 4-10
© 1996, ADC Telecommunications, Inc.
FIBER
TERMINAL
IN
1897-A
ADCP-80-323
1st Edition, Issue 2, December 1996
PROCEDURE 8
INTERBAY PATCHING BY MEANS OF SHORT PATCH CORDS
This procedure is used to patch between bay lineups or between distant bays in the same lineup,
without the use of long patch cords. Patching is accomplished with several short patch cords,
using the interbay patch panels. A typical example is when a DSX circuit is patched from lineup
1 to lineup 2 via interbay patch panels in maintenance bays.
STEP
PROCEDURE
1
Install patch cord in DSX OUT jack in lineup 1 to interbay IN jack in maintenance bay in
lineup 1.
Install patch cord in DSX IN jack in lineup 1 to interbay OUT jack in maintenance bay in
lineup 1.
2
Install patch cord in DSX OUT jack in lineup 2 to interbay IN jack in maintenance bay in
lineup 2.
Install patch cord in DSX IN jack in lineup 2 to interbay OUT jack in maintenance bay in
lineup 2.
MON
OUT
SHORT
PATCH PERMANENT COAXIAL
CORDS
TIE CABLES
OUT
IN
IN
INTERBAY PATCH PANEL
IN MAINTENANCE BAY
IN LINEUP 1
NOTE: CROSS-CONNECT JUMPERS ARE NOT SHOWN.
OUT
OUT
IN
DSX IN LINEUP 1
MON
OUT
OUT
EQUIPMENT
A
SHORT
PATCH
CORDS
IN
IN
EQUIPMENT
A
IN
INTERBAY PATCH PANEL
IN MAINTENANCE BAY
IN LINEUP 2
DSX IN LINEUP 2
1898-A
Page 4-11
© 1996, ADC Telecommunications, Inc.
MAINTENANCE
ADCP-80-323
1st Edition, Issue 2, December 1996
SECTION 5
MAINTENANCE
Contents
Page
1. GENERAL ........................................................................... 5-1
2. PREVENTIVE MAINTENANCE ........................................................... 5-1
3. CORRECTIVE MAINTENANCE ........................................................... 5-1
A.
Troubleshooting................................................................... 5-1
B.
Tracer Lamp Replacement ........................................................... 5-2
C.
Fuse Replacement ................................................................. 5-2
D.
Module Replalcement............................................................... 5-2
1. GENERAL
This section provides information necessary to maintain the DSX System. Maintenance
1.01
requirements are minimal, consisting for the most part of periodic cleaning and tracer lamp
replacement.
2. PREVENTIVE MAINTENANCE
Systems should be cleaned during routine office equipment maintenance. Accumulated
2.01
dust and film should be removed using a vacuum cleaner and clean soft brushes and cloths. Care
must be taken to prevent dust and dirt from getting into jacks.
3. CORRECTIVE MAINTENANCE
3.01
DSX corrective maintenance consists of:
(a)
Replacement of burned out fuses and tracer lamps.
(b)
Replacement of modules.
(c)
Inspection and repair of wiring and connections.
For any repairs other than described in this section contact ADC Field Services at
3.02
(612) 946-3030. If a call is placed after hours or on a holiday or weekend, an answering device
will take the message and alert service personnel for call-back the following business day.
A. Troubleshooting
Troubleshooting of the DSX System consists of visual inspection and continuity testing.
3.03
Cross-connections can be quickly checked by bypassing them with patch cords to the
corresponding IN and OUT jacks.
Page 5-1
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
B. Tracer Lamp Replacement
Burned out tracer lamps are replaced at the front of the DSX bay. Lamps are removed by
3.04
pulling them from the panel sockets. No special tools are required. Replacement lamps must be
inserted with the negative (–) terminal up.
C. Fuse Replacement
Burned out fuses are replaced at the front of the fuse panel. Fuses are removed by pulling
3.05
them from the panel sockets and installed by pressing them into the panel sockets. No special
tools are required.
Caution: A replacement fuse must have exactly the same current rating as the fuse being
replaced.
D. Module Replacement
3.06
DSX Modules in DS3 systems should be repaired by ADC. To replace a module:
(a)
Record or tag all cross-connect In/Out and patch cables connected to the circuit module.
(b)
Disconnect all cables to the front and back of the module.
(c)
Remove all module mounting screws.
(d)
Carefully pull the module from the front of the bay/chassis.
(e)
Carefully slide the replacement module into the bay/chassis.
(f)
Reinstall the module mounting screws.
(g)
Reattach all cables to the front and back of the module as shown on previously prepared
records or tags (see step a).
Page 5-2
© 1996, ADC Telecommunications, Inc.
WORKSHEETS
ADCP-80-323
1st Edition, Issue 2, December 1996
SECTION 6
WORKSHEETS
Contents
Page
WORKSHEET 1 .......................................................................... 6-2
WORKSHEET 2 .......................................................................... 6-3
WORKSHEET 3 .......................................................................... 6-4
WORKSHEET 4 .......................................................................... 6-5
WORKSHEET 5 .......................................................................... 6-6
WORKSHEET 6 .......................................................................... 6-7
This section contains all worksheets required to design a DSX System for a specific office.
Additional copies of each worksheet may be made as necessary. The System Design Section of
this Application Guide describes the use of the worksheets and shows completed samples.
Worksheet 1:
Network Rack, 2" WECO Mounting Spaces
Worksheet 2:
Network Rack, 1.75" EIA Mounting Spaces
Worksheet 3:
Unequal Flange Rack, 2" WECO Mounting Spaces
Worksheet 4:
Unequal Flange Rack, 1.75" EIA Mounting Spaces
Worksheet 5:
Floor-Supported Channel Rack, 1.75" EIA Mounting Spaces
Worksheet 6:
Calculation of DSX-3 Horizontal Wireway Dimensions
Page 6-1
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition Issue 2, December 1996
WORKSHEET 1: NETWORK RACK, 2" WECO MOUNTING SPACES
65
65 (11.5' RACK)
60
55
50
50 (9' RACK)
45
40
39 (7' RACK)
35
30
25
20
15
10
2.00
5
1
4.50 GUARD BOX
1863-A
Page 6-2
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
WORKSHEET 2: NETWORK RACK, 1.75" EIA MOUNTING SPACES
75
75 (11.5' RACK)
70
65
60
58 (9' RACK)
55
50
45
44 (7' RACK)
40
35
30
25
20
15
10
1.75
5
1
4.50 GUARD BOX
1864-A
Page 6-3
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition Issue 2, December 1996
WORKSHEET 3: UNEQUAL FLANGE RACK, 2" WECO MOUNTING SPACES
64
64 (11.5' RACK)
60
55
50
49 (9' RACK)
45
40
38 (7' RACK)
35
30
25
20
15
10
2.00
5
1
6.00 GUARD BOX
1865-A
Page 6-4
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
WORKSHEET 4: UNEQUAL FLANGE RACK, 1.75" EIA MOUNTING SPACES
73
73 (11.5' RACK)
70
65
60
55
56 (9' RACK)
50
45
43 (7' RACK)
40
35
30
25
20
15
1.75
10
5
1
6.00 GUARD BOX
1866-A
Page 6-5
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition Issue 2, December 1996
WORKSHEET 5: FLOOR-SUPPORTED CHANNEL RACK, 1.75" EIA MOUNTING SPACES
73
73 (11.5' RACK)
70
65
60
56 (9' RACK)
55
50
45
42 (7' RACK)
40
35
30
25
20
15
10
1.75
5
1
1867-A
Page 6-6
© 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
WORKSHEET 6
CALCULATION OF DSX-3 HORIZONTAL WIREWAY DIMENSIONS
A. Number of terminations per chassis or panel
_________
B. Number of chassis or panels per bay
_________
C. Number of bays per lineup
_________
D. Total number of terminations (A x B x C)
_________
E. Each cross-connect has 2 terminations (D / 2)
_________
F. Half the cross-connects use upper wireway and
half use lower wireway (E / 2)
_________
G. Peak pileup at any one point expected to be no more than
50% of total cross-connects (F x .50)
_________
H. Number of cross-connects per square inch of wireway
(see Table 2-9) (G / number of cross-connects per square
inch)
_________
I. Recommended wireway size to be equal or greater than
item H, i.e.
5 x 6 = 30 sq in
5 x 8 = 40 sq in
_________
1868-A
Table 6-1. Quantity of Cross-Connect Jumpers Per Square Inch of Wireway
TYPE OF CROSS-CONNECT JUMPER
NUMBER OF CROSS-CONNECT JUMPERS
(TWO SINGLE OR ONE DUAL JUMPER)
PER SQUARE INCH OF HORIZONTAL CABLE TROUGH
735A With Messenger
10
Triax
10
RG59 With Messenger
5
Page 6-7
© 1996, ADC Telecommunications, Inc.
GENERAL INFORMATION
ADCP-80-323
1st Edition, Issue 2, December 1996
SECTION 7
GENERAL INFORMATION
Content
Page
1. WARRANTY/SOFTWARE ............................................................... 7-1
2. SOFTWARE SERVICE AGREEMENT ...................................................... 7-1
3. REPAIR/EXCHANGE POLICY ............................................................ 7-1
4. REPAIR CHARGES .................................................................... 7-2
5. REPLACEMENT/SPARE PRODUCTS ...................................................... 7-2
6. RETURNED MATERIAL................................................................. 7-2
7. SYSTEM INTEGRATION SERVICES ....................................................... 7-3
8. CUSTOMER SUPPORT SERVICES ........................................................ 7-3
1. WARRANTY/SOFTWARE
The Product and Software warranty policy and warranty period for all Products of ADC
1.01
Telecommunications, Inc. (hereinafter referred to as ADC) is published in ADC’s
Warranty/Software Handbook. Contact the Broadband Connectivity Group (BCG) Technical
Assistance Center at 1-800-366-3891, extension 3475 (in U.S.A. or Canada) or 612-946-3475
(outside U.S.A. and Canada) for warranty or software information or for a copy of the
Warranty/Software Handbook.
2. SOFTWARE SERVICE AGREEMENT
ADC software service agreements are available for some ADC Products on a fee basis.
2.01
Contact the BCG Technical Assistance Center at 1-800-366-3891, extension 3475 (in U.S.A. or
Canada) or 612-946-3475 (outside U.S.A. and Canada) for Software service agreement
information.
3. REPAIR/EXCHANGE POLICY
All repairs of ADC Products must be done by ADC or an authorized representative. Any
3.01
attempt to repair or modify ADC Products without prior written authorization from ADC shall
void ADC’s warranty.
If a malfunction cannot be resolved by the normal troubleshooting procedures, call the
3.02
BCG Technical Assistance Center at 1-800-366-3891, extension 3475 (in U.S.A. or Canada) or
612-946-3475 (outside U.S.A. and Canada). A telephone consultation can sometimes resolve a
problem without the need to repair or replace the ADC Product.
If, during a telephone consultation, ADC determines the ADC Product requires repair,
3.03
ADC will authorize the return of the affected Product by the issue of a Return Material
Authorization number and complete return shipping instructions. If time is critical, ADC can
arrange to ship a replacement Product when available from designated inventory. In all cases, the
defective Product must be carefully packaged to eliminate damage, and returned to ADC in
accordance with issued ADC instructions.
Page 7-1
 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
4. REPAIR CHARGES
If the defect and the necessary repairs are covered by warranty, Buyer’s only obligation
4.01
is the payment of all transportation and associated costs in returning the defective Product to the
location designated by ADC. ADC, at its option, will either repair or replace the Product at no
charge and return the Product to Buyer with transportation costs paid by ADC, only when ADC
contracted carriers are used. Requested return of Product by any other means will be at Buyer’s
cost. Buyer is responsible for all other associated costs in return of Products from ADC. If
Product is Out of Warranty or NTF (no trouble found), ADC will charge a percentage of the
current Product list price. To obtain the percentage factor for Out of Warranty or NTF Product,
contact the ADC Product Return Department at 1-800-366-3891, extension 3000 (in U.S.A. or
Canada) or 612-946-3000 (outside U.S.A. and Canada).
If a service effecting advance replacement Product is requested, the current list price of a
4.02
new Product will be charged initially. Customer purchase order is required to ship an advance
replacement Product. Upon receipt of the defective Product, ADC will credit Buyer with twenty
percent (20%) of Product list price charged for any returned Product found to be Out of
Warranty, or one hundred percent (100%) credit for any In Warranty Product under the Program
terms. Products must be returned within thrity (30) days to be eligible for any advance
replacement credit. If repairs necessitate a field visit by an ADC representative, customer
authorization (purchase order) must be obtained prior to dispatching a representative, ADC will
charge the current price of a field visit plus round trip transportation charges from Minneapolis
to the customer’s site.
5. REPLACEMENT/SPARE PRODUCTS
Replacement parts, including but not limited to button caps and lenses, lamps, fuses, and
5.01
patch cords, are available from ADC on a special order basis. Contact the BCG Technical
Assistance Center at 1-800-366-3891, extension 3475 (in U.S.A. or Canada) or 612-946-3745
(outside U.S.A. and Canada) for additional information.
Spare Products and accessories can be purchased from ADC. Contact Sales
5.02
Administration at 1-800-366-3891, extension 3000 (in U.S.A. or Canada) or 612-946-3000
(outside U.S.A. and Canada) for a price quote and to place your order.
6. RETURNED MATERIAL
Contact the ADC Product Return Department at 1-800-366-3891, extension 3000 (in
6.01
U.S.A. or Canada) or 612-946-3000 (outside U.S.A. and Canada) to obtain a Return Material
Authorization number prior to returning an ADC Product.
All returned Products must have a Return Material Authorization (RMA) number clearly
6.02
marked on the outside of the package. The Return Material Authorization number is valid for
ninety (90) days from authorization.
Page 7-2
 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
7. SYSTEM INTEGRATION SERVICES
ADC offers the following system integration services. For calls originating in the U.S.A.
7.01
or Canada, dial 1-800-366-3891, extension 3000. For calls originating outside the U.S.A. or
Canada, dial 612-946-3000.
Technical Assistance Center
•
•
•
•
•
•
•
•
•
•
•
Product Management
Project Engineering
Project Administration
Network Design
Broadband Design (RF Design and Strand Mapping)
Integration Network Testing
Network Monitoring (Upstream or Downstream)
Power Monitoring
Remote Surveillance
System Turn-Up and Test
Service/Maintenance Agreements
Technical Training
• Product Technology
• Custom Designed Training
Technical Operations
• Detail Engineering
• End-to-End Installation
• Drafting Services
8. CUSTOMER SUPPORT SERVICES
ADC offers the following customer support services. For calls originating in the U.S.A.
8.01
or Canada, dial 1-800-366-3891, then request the extension listed. For calls originating outside
the U.S.A. or Canada, dial 612-946-3475 or 612-946-3000.
BCG Technical Assistance Center
Extension 3475
E-Mail: bcgtac@adc.com
•
•
•
•
•
•
•
•
Technical Information
System/Network Configuration
Product Specification
Product Application
Training
Installation and Operation Assistance
Troubleshooting and Repair
Field Assistance
Sales Administration
Extension 3000
•
•
•
•
Quotation Proposals
Ordering
Delivery
General Product Information
Product Return Department
Extension 3000
E-Mail: repair&return@adc.com
• ADC Return Authorization number and instructions
must be obtained before returning products.
8.02 Product information and service can also be obtained by writing ADC Telecommunications,
Inc., 4900 West 78th Street, Minneapolis, Minnesota 55435, U.S.A.
Page 7-3
 1996, ADC Telecommunications, Inc.
ADCP-80-323
1st Edition, Issue 2, December 1996
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior
notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits
and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar
damages. This disclaimer of liability applies to all products, publications and services during and after the
warranty period.
This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891,
extension 3475 (in U.S.A. or Canada) or 612-946-3475 (outside U.S.A. and Canada), or by writing to ADC
Telecommunications, Inc., Attn: Technical Assistance Center, Mail Station #77, 4900 West 78th Street, Minneapolis, MN
55435, U.S.A.
© 1996, ADC Telecommunications, Inc.
All Rights Reserved
Printed in U.S.A.
Page 7-4