OptiX RTN 980 Radio Transmission System V100
IDU Quick Installation Guide (Indoor)
Issue: 01
Date: 2018-10-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2018. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made bet ween Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees
or representations of any kind, either express or implied.
The information in this document is subject to change without notice. E very effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
http://www.huawei.com
Email:
support@huawei.com
Installation Process
Start
Before You Start
Page 2
Page17
Installing PGND
Cables
Pages
18 to 19
Installing Power
Cables
Precautions for
Handling the Toggle
Lever Switch
Page 19
Installing E1 Cables
Pages
5 to 6
Precautions for
Handling IF Cables
Page 20
Installing Ethernet
Service Cables
Page 7
Precautions for
Handling IF Boards
Page 20
Installing XPIC
Cables
Page 8
Tools for Installation
Page 21
Installing IF
Jumpers
Pages
9 to 11
Introduction to the
RTN 980 Equipment
Pages
22 to 23
Installing Fibers
Pages
12 to 14
Installing the RTN
980
Page 23
Installing STM-1e
Cables
Pages
14 to 15
Optional: Installing
the E1 Panel
Pages
23 to 24
Installing NM
Cables
Page 24
Installing Orderwire
Phone Cables
Page 25
Installing External
Clock Cables
Page 26
Installing
Asynchronous and
Synchronous Data
Cables
Page 27
Installing External
Alarm Cables
Page 28
Cable Layout
Effectiveness
Page 3
Page 4
Pages
11 to12
Installing the
Chassis in the 19Inch Cabinet
Pages
12 to 13
Installing the
Chassis in the
ETSI Cabinet
Page 16
Pages
35 to37
Installing Power
Cables for the C3
PDU
Pages
38 to 40
Assembling Cable
Connectors
Precautions
Instructions and
Precautions for
Handling Boards
Installing Boards
Pages
17 to 28
Installing IDU
Cables
Page 34
Checking the
Installation
Pages
35 to40
Appendixes
End
Commissioning Process
Start
Page 29
Powering On the
Equipment
Page 30
Configuring the NE
Data (by Using the
Web LCT)
Pages
31 to 33
Aligning the
Antennas
Page 33
Checking the Radio
Link Status
End
1
Pages
31 to 32
Aligning the SinglePolarized Antennas
Pages
32 to 33
Aligning the DualPolarized Antennas
Precautions
NOTE
This document provides quick guidelines for hardware installation.
This document does not describe pre-delivery assembly. This document describes only procedures for
onsite installation.
CAUTION
Power Supply
The equipment uses a -48 V/-60 V DC power supply. An AC power supply or a high-voltage power
supply may cause equipment damage or even human injuries and therefore is forbidden.
CAUTION
Electrostatic Discharge
Wear ESD gloves or an ESD wrist strap prior to contact
with the equipment or before handling the plug-boards,
boards, and IC chips to prevent damage to sensitive
components caused by electrostatic discharge from the
human body. Ensure that the other end of the ESD wrist
strap is properly grounded.
CAUTION
Binding Cables
Binding intervals between cable ties or optical fiber binding straps inside the cabinet cannot exceed 250 mm.
(The distance cannot exceed 200 mm for user cables).
Binding intervals between cable ties for all cables and corrugated pipes outside the cabinet are determined
according to the distance between the two horizontal beams. If the cable trough does not contain any beams,
the binding intervals between cable ties cannot exceed 250 mm.
CAUTION
Pre-installation Check
Check the telecommunications room, cabinet, power supply, ground wires, optical cables, and
associated facilities prior to installation. Start the installation according to the engineering design
documents after verifying that conditions are met.
2
Instructions and Precautions for Handling Boards
CAUTION
Do not hold a board without hand protection. Wear an ESD wrist strip or ESD gloves before handling a board.
Wearing ESD gloves
Wearing an ESD strip
Holding a board without hand protection
CAUTION
Hold the front panel of a board with hands.
CAUTION
Insert filler panels into vacant slots on an NE to prevent foreign matters from getting into the NE, which
may result in faults on the NE.
Boards are fragile and valuable. When handling or placing a board, exercise caution and put it into a
dedicated packing box.
3
Precautions for Handling the Toggle Lever Switch
• Position and description of the toggle lever switch
O: OFF
CAUTION
Turn the toggle lever switch only after
gently pulling it out.
I : ON
NOTE
A dual-channel IF board does not
have a toggle lever switch.
•Turning on the switch
1
1 Pull the switch out gently.
3
2
2 Turn the switch.
3
Release the switch.
•Turning off the switch
1
1 Pull the switch out gently.
3
2
2 Turn the switch.
4
3
Release the switch.
Precautions for Handling IDU-side IF Cables (SingleChannel IF Board)
CAUTION
CAUTION
Connect or disconnect an IF cable only after
powering off the ODU.
Do not connect or disconnect an IF cable when the
ODU is powered on.
1
Power off the ODU.
2
Connect or disconnect the IF cable .
Precautions for Handling ODU-side IF Cables (SingleChannel IF Board)
CAUTION
CAUTION
Connect or disconnect an IF cable only
after powering off the ODU.
Do not connect or disconnect an IF cable when the
ODU is powered on.
Power off the ODU.
Connect or disconnect the IF cable.
5
Precautions for Installing IF Cables (Dual-Channel IF Board)
CAUTION
When installing an IF cable, connect one end of the cable
to the ODU and then connect the other end of the cable to
the IDU.
Connect the IF cable to the ODU.
Connect the IF cable to the IDU.
Precautions for Removing IF Cables (Dual-Channel IF
Board)
CAUTION
When removing or replacing an IF cable, disconnect one
end of the cable from the IDU and then disconnect the
other end of the cable from the ODU.
Disconnect the IF cable from the IDU.
Disconnect the IF cable from the ODU.
6
Precautions for Handling IF Boards
CAUTION
Remove or insert an IF board only after powering off the ODU.
1
2
3
Remove the IF board.
3
Insert the IF board.
Power off the ODU.
Skip this step if a dual-channel IF
board is concerned.
Disconnect the IF jumper.
CAUTION
Do not remove or insert an IF board when the ODU is powered on.
7
Remove or insert the IF board.
Tools for Installation
Long measuring tape
Level
Socket w rench
Torque w rench
Wire stripper
RJ45 crimping tool
Bayonet w rench
Combination pliers
Hammer drill
Marker
ESD gloves
ESD w rist strap
Vacuum cleaner
Binding strap
Phillips screwdriver
Flat-head screwdriver
Adjustable w rench
Hex key
COAX crimping tool
Wire clippers
Diagonal pliers
Cold press pliers
Needle-nose pliers
File
Multimeter
Heat gun
Utility knife
Ladder
Insulation tape
8
Claw hammer
Antistatic gloves
Electric iron
Impact tool
Coax stripper
Netw ork cable tester
Introduction to the RTN 980 Equipment
1 Exterior of the RTN 980
a
Front View
b
Oblique View
c
9
Side View
2 Installation Requirements of the Cabinet and Mounting Ears
NOTE
Before installing the equipment, ensure that the cabinet has already been installed. The cabinet can be installed
on the ESD floor or concrete floor. For details about how to install the cabinet, see the Cab inet Installation Guide
delivered with the cabinet.
The equipment can be installed in an ETSI cabinet, a 21-inch open rack, or a 19-inch standard cabinet.
NOTE
The equipment can be installed when no guide rail is provided. You can install the mounting ears and
equipment based on the following procedure:
1. Separately mount M6 screws into the bottom -lower floating nuts of the mounting bar on both sides of the
cabinet, and reserve sufficient space for installing mounting ears between the screws and the mounting bar.
Then, confirm that an appropriate length of M6 screws is inserted into the floating nuts to avoid fall -off of the
chassis.
2. Place the chassis into the cabinet. Note: Place the cucurbit-shape holes in the lower part of the
mounting ears onto the M6 screws and use the M6 screws to secure the chassis onto the cabinet.
10
NOTE
The default mounting ears are applicable to the situation where the equipment is installed in a 19 -inch standard
cabinet. When installing the equipment in another type of cabinet, use other mounting ears as required. When
installing the equipment in a 21-inch cabinet, install two sets of mounting ears. That is, retain the default
mounting ears, and install another set of mounting ears for the equipment installed in the 21 -inch cabinet.
Generally, install mounting ears in an ETSI cabinet.
Install mounting ears in a19-inch standard cabinet.
19-inch ear
ETSI ear
Install mounting ears in an N63B cabinet.
ETSI ear
NOTE
Cabinet-sharing Installation
The RTN 980 can be placed in a stacked manner.
When the RTN 980 and other type of equipment are installed in the same cabinet, it is recommended that
you reserve a 2U or greater space for heat dissipation.
When the RTN 980 and other type of equipment are installed in the same cabinet, the temperature in the
air outlet needs to be lower than 50°C if the lower equipment emits the air on its top. Otherwise, use an
air guide plate for separation between the upper equipment and the lower equipment.
11
Installing the RTN 980
1 Installing the Chassis in the 19-Inch Cabinet
a
Fixing Floating Nuts
Floating nut
Installation hole
NOTE
When tightening floating nuts, ensure a minimum of 25 mm space on the left and right sides of the RTN 980
for ventilation.
b
Removing Screws
NOTE
Store the removed screws properly for installing PGND cables.
12
c
Installing the Chassis in the Cabinetd
Installing PGND Cables
To the ground point on the column of the cabinet or
the indoor ground bar
Cable tray
M6
30±3 Kgf.cm
Connect PGND cables by using the removed screws.
2 Installing the Chassis in the ETSI Cabinet
a
b
Fixing Floating Nuts
Replacing Mounting Ears
NOTE
Before installing the chassis in an ETSI cabinet, replace
mounting ears based on the type of the cabinet.
Installation hole
Floating nut
M4
When tightening floating nuts, ensure a minimum of 25
mm space on the left and right sides of the RTN 980 for
ventilation.
M4 screw
13
12±1.2 Kgf.cm
c
d
Installing PGND Cables
Installing the Chassis in the
Cabinet
To the ground point
on the column of
the cabinet or the
indoor ground bar
M6
M6
30±3 Kgf.cm
NOTE
30±3 Kgf.cm
Install the cable tray if provided.
Connect PGND cables by using the removed screws.
Optional: Installing the E1 Panel
1 Fixing Floating Nuts
Floating nut
Installation hole
14
2
Fixing the E1 Panel
M6
30±3 Kgf.cm
3 Installing PGND Cables on the E1 Panel
To the ground point on the column of
the cabinet or the indoor ground bar
15
Installing Boards
2
1
3
4
Guide rail
Loosen the screws on the filler panel and remove the filler panel.
Hold the ejector levers on the panel with hands and raise them to form an angle of approximately 45 degrees
between the ejector levers and the panel. Push the board gently along the guide rail until the board is secure.
Lower the two ejector levers of the board.
Tighten the screws on the panel.
NOTE
Before installing and removing/inserting a board, wear an ESD wrist strap or ESD gloves. Before you insert
a board, ensure that the slot is correct. If it is difficult to insert the board, stop the operation.
16
Installing Cables for the RTN 980
1 Installing PGND Cables
When installing a PGND cable in the ETSI cabinet, connect the PGND cable to the ground point on the left side
of the chassis.
When installing a PGND cable in the 19-inch cabinet, connect the PGND cable to the ground point of the left
mounting ear of the chassis.
17
2 Installing Power Cables
M6
-48 V
0V
50±5 Kgf.cm
1
2
3
CAUTION
If the AC power box (ETP 4890) is used, the IDU needs to use the BGND power cable and -48 V power cable that are
delivered with the AC power box. For details on the AC power box and its cables, see the IDU hardware description.
Open the cover and remove the bolt.
Install the power cable by using
the removed bolt.
Check the voltage and polarity of the external power supply.
Check the fuse current of the external power supply.
Recommended Current Value of the
External Fuse
Reseat the cover.
Standard Voltage of the
Input Power
Allowable Voltage Range
–48 V ( DC )
–38.4 V to –57.6 V ( DC )
–60 V ( DC )
–48 V to –72 V ( DC )
40 A
WARNING
The IDU does not support AC power. Do not connect the IDU to
an AC power supply. Otherwise, equipment may be damaged
and you may be injured.
18
6
Ensure that the circuit breaker of the PDU is set to the OFF state. Insert the DC connector into the power port
of the PDU. Ensure that the two groups of power cables are connected to different wiring terminals,
PIU boards in 1+1 hot
backup mode
Power box
0V
-48V
0V
-48V
CAUTION
If the C3 PDU is available, see “Installing Power Cables for the C3 PDU” in Appendixes.
If an external power box is used, cut off the input of the power box before you connect power cables.
3 Installing E1 Cables
a
Optional：Connecting E1 Cables
to the External Equipment
b
Optional: Connecting E1 Cables
to the E1 Panel
The SP3D, MD1, ML1, and SP3S boards provide the E1 port.
SP3D board
NOTE
SP3D board
For information about the wiring sequence of the E1 cables,
see the wiring table delivered with the E1 cables or the
cable part in the Hardware Description.
For a 1.6 mm diameter E1 cable, use a type 75-1-1
connector and a 2.5 mm or 1.7 mm COAX crimping tool
when assembling the DDF-side connector of the E1 cable.
19
4 Installing Ethernet Service Cables
The EFP8, EM6T, EM6TA, EM6F, EM6FA, and
EMS6 boards provide the FE ports.
The CSHN, CSHNA, EM6T, EM6TA, EG4,
and EG4P boards provide the GE electrical
ports.
EM6T board
NOTE
The Ethernet service port supports the MDI/MDI-X adaptive function. Therefore, you
can assemble either a crossover cable or a straight-through cable. It is recommended
that you assemble a straight-through cable.
5 Installing XPIC Cables
The ISX2, ISM6, and ISV3 (XPIC function enabled)
boards support the XPIC function.
X-OUT
X-IN
X-OUT
X-IN
XPIC IF board
NOTE
The IN port on one XPIC IF board must be connected to the OUT port on the other XPIC IF board.
CAUTION
•If the XPIC function is disenabled on an ISX2 board, use a short XPIC cable to connect the IN and OUT
ports on the board. Otherwise, board performance will be affected.
•If the XPIC function is disenabled on an ISV3 board, do not use a short XPIC cable to connect the IN and
OUT ports on the board. Otherwise, the board performance will be affected.
•ISM6 boards support intra-board XPIC. Therefore, you do not need to install XPIC cables.
20
6 Installing IF Jumpers
a
Installing an IF Jumper
The ISM6, ISV3, IF1, IFU2, ISU2,
ISX2, and IFX2 boards provide the
IF port.
ISU2 board
ODU switch
CAUTION
Before installing an IF jumper on a single-channel IF board, turn off the ODU switch on the IF board.
If an RG-8U IF cable or a 1/2-inch IF cable is used, an IF jumper is required to connect the IF cable and
IDU; if a 5D IF cable is used, the 5D IF cable is directly connected to the IDU.
b
Connecting the IF Jumper Directly to the IF Cable
IF jumper
IF cable
NOTE
When connecting an IF jumper to an IF cable, you must test the connectivity of the IF cable.
On the equipment configured with IF 1+1 protection, the IF cable of the active ODU must be connected to
the IF jumper of the active IF board, and the IF cable of the standby ODU must be connected to the IF
jumper of the standby IF board.
If the XPIC IF board is used, the IF cable connected to the vertically polarized ODU must be connected to
the IF jumper on the IF board that processes vertically polarized waves, and the IF cable connected to the
horizontally polarized ODU must be connected to the IF jumper of the IF board that processes horizontally
polarized waves.
21
7 Installing Fibers
a
Precautions
CAUTION
When installing or maintaining fibers, do not look into the optical port without eye protection. See Figure 1.
Coil up the inter-office fibers on the ODF and then route them into the cabinet. Do not coil up external fibers
in the cabinet.
NOTE
When routing fibers, take proper measures to avoid any damage to fiber connectors
After installation of the fibers, place protective caps on to the idle optical ports, and place fiber caps on to the
idle fibers. See Figure 2.
Figure 1
Figure 2
Fiber w ith a short
protective tube
Fiber cap
Dustproof cap
Pluggable optical module
NOTE
For a closed corrugated pipe, take protective measures and then route fibers into the corrugated pipe. For an
open corrugated pipe, route fibers into the corrugated pipe and then take protective measures.
After routing fibers into a corrugated pipe, wrap PVC insulation tapes around the cuts of the corrugated pipe.
Do not feed a large number of fibers in a corrugated pipe. It is recommended that you feed not more than sixty
2 mm diameter fibers in an open corrugated pipe and not more than twenty 2 mm diameter fibers in a closed
corrugated pipe (See Figure 3).
The corrugated pipe needs to be routed into the cabinet for approximately 10 cm (See Figure 4).
Figure 3
Figure 4
10 cm
22
b
Installing Fibers
The CQ1, SL1D, SL1DA, CSHN,
CSHNA, EM6F , EM6FA, EMS6, EG4,
and EG4P boards provide the optical
port.
SL1D board
8 Installing STM-1e Cables
The CQ1, SL1D, SL1DA board provides
the STM-1e electrical port.
SL1D board
9 Installing NM Cables
a
Installing the NM Cables (for a Gateway NE)
The CSHN, CSHNA board provides the
NMS/COM port.
NMS/COM
CSHN board
NMS
23
b
Installing the NM Cables (for Multiple Interconnected NEs at a Site)
EXT
EXT
MD1
MD1
NMS/COM
MD1
NMS/COM
NOTE
Assemble a crossover cable or a straight-through cable on site.
Ensure that the interconnected network cables do not form a loop and the standby CSH/CSTA board is not
connected to another network cable.
10 Installing Orderwire Phone Cables
The AUX board provides the PHONE port.
PHONE
AUX board
24
11 Installing External Clock Cables
a
Assembling External Clock Cables Based on the Pin Assignment
Pin
1
Color
Relationship
White/Orange
CLK/TOD1
Negative receive end of the external clock
Twisted pair
2
3
6
4
Orange
Positive receive end of the external clock
White/Green
External time 1_N
Twisted pair
Green
External time 1_P
Negative transmit end of the external clock
Blue
Twisted pair
5
White/Blue
7
White/Brown
Positive transmit end of the external clock
External time 2_N
Twisted pair
8
Brown
External time 2_P
b Installing External Clock/Time Cables for the RTN 980
The CSHN, CSHNA board provides the CLK/TOD1 port.
CLK/TOD1
CSHN board
25
12 Installing Asynchronous and Synchronous Data Cables
a
Assembling Asynchronous and Synchronous Data Cables Based on the
Pin Assignment
Pin Assignment
Pin
1
2
3
6
4
5
7
8
b
Color
Relationship
Function
White/Orange
Transmits asynchronous data signals.
Twisted pair
Orange
Grounding
Receives asynchronous data signals.
White/Green
Twisted pair
Green
Grounding
Blue
Transmits synchronous data signals (TIP).
Twisted pair
White/Blue
Transmits synchronous data signals (RING).
White/Brown
Receives synchronous data signals (TIP).
Twisted pair
Brown
Receives synchronous data signals (RING).
Installing Synchronous and Asynchronous Data Cables for the RTN 980
The AUX board provides the F1/S1 port.
F1/S1
AUX board
26
13 Installing External Alarm Cables
a
Assembling External Alarm Cables Based on the Pin Assignment
Pin
1
2
3
Color
Relationship
White/Orange
ALMO
ALMI
External alarm signal input 1
Positive alarm signal output 1
Twisted pair
Orange
Grounding
White/Green
Negative alarm signal output 1
Positive alarm signal output 2
External alarm signal input 2
Twisted pair
6
4
5
b
Green
Grounding
Blue
Negative alarm signal output 2
External alarm signal input 3
Positive alarm signal output 1
Twisted pair
White/Blue
7
White/Brown
8
Brown
Grounding
Negative alarm signal output 1
External alarm signal input 4
Positive alarm signal output 2
Twisted pair
Grounding
Negative alarm signal output 2
Installing External Alarm Cables for the RTN 980
The AUX board provides the ALMO port and ALMI port.
ALMI
ALMO
AUX board
27
14 Cable Layout Effectiveness
a
Cable Connections
5
9
7
2
12
1
MD1
6
3
11
8
10
4
b
PGND Cables
Ethernet Service
Cables
NM Cables
10
Asynchronous and Synchronous Data
Cables
Pow er Cables
IF Jumpers
Orderw ire Phone Cables
11
External Alarm Cables
E1 Cables
Fibers/STM-1 Cables
External Clock Cables
12
XPIC Cables
Cable Layout Effectiveness
28
Powering On the Equipment
CAUTION
Before powering on the equipment, ensure that the installation of the ODU is completed and the ODU
switch on the IF board is set to the OFF state.
ALM
PWR
ALM
PWR
ALM
ALM
MD1
PWR
PWR
FAN
Status Description of Indicators
Indicator
Status
Description
PWR
Constantly on and green
The power is functioning properly.
Off
ALM
The power supply fails.
Constantly on and green
Constantly on and red
Off
FAN
The board is being initialized.
The power board reports an alarm.
No alarm is reported.
Normally on in green color
Constantly on and red
Off
The fan is functioning properly.
The fan is malfunctioning.
The fan is powered off.
Check and ensure that the STAT indicators on the system control, switching, and timing board are on in green
color.
29
MD1
Configuring NE Data (by Using the Web LCT)
CSHN board
NMS/COM
You can use the Web LCT to configure NE data, including basic data of the NE, IF/ODU information of the
radio link, parameters for the IF ports, and parameters for the ODU ports.
30
Aligning Antennas
1 Aligning Single-Polarized Antennas
Determine the azimuth of the antenna according to the installation position and height of the antenna.
Adjust the elevation of the antenna to the horizontal position.
Connect a multimeter to the RSSI port on the ODU at the local end and measure the voltage value VBNC.
NOTE
The red line of the multimeter is connected to the pin, and the black line of the multimeter is connected
to the inner wall (ground pin).
Elevation adjustment screw
Level adjustment screw
Retain the remote antenna secure. Adjust the level adjustment screw. At the local end, rotate the antenna
widely in the horizontal direction.
a
If three signal peaks are tracked, adjust the azimuth of the antenna so that the received signal level (RSL)
reaches the peak value at position 2.
b
If two signal peaks are tracked, adjust the azimuth of the antenna to the middle of positions 4 and 5. Then,
adjust the elevation of the antenna so that the three signal peaks such as the signals on the line AA' can
appear. Adjust the antenna so that the RSL reaches the peak value at position 2.
c
If one signal peak is tracked, adjust the azimuth of the antenna to the middle of positions 6 and 7. Then,
adjust the elevation of the antenna so that the three signal peaks such as the signals on the line AA' can
appear. Adjust the antenna so that the RSL reaches the peak value at position 2.
31
Front view of the lines tracked at
different elevations of the antenna
RSL value of each line
天线不同仰角下扫描路径的正面图
各路径信号值
6 7
6
C
B
A
7
C'
5
4
1
2
5
4
B'
3
C'
C
B'
B
A'
2
1
A
3
A'
Adjust the elevation adjustment screw. At the local end, gently adjust the elevation and azimuth until the
RSL reaches the peak within the tracked range.
Repeat Steps 3 to 4 to ensure that three signal peaks are tracked in both horizontal and vertical directions.
When the local RSL reaches the maximum peak value, tighten the local antenna.
Adjust the remote antenna to ensure that the RSL at the local end and the RSL at the remote end reach
the peak value. Check the status of the ODU indicator on the IF board. The ODU indicator on the IF board
is off. If the ODU indicator on the IF board is yellow and blinks every 300 ms, continue aligning the
antenna.
Tighten all the screws of the antennas after the alignment is completed.
2
Aligning Dual-Polarized Antennas
NOTE
If an OMT is used to connect the ODUs to the antenna in direct-mounting mode, align the antenna in the same
method as that for aligning single-polarized antennas. If soft waveguides are used to connect the ODUs to the
antenna in separate-mounting mode, follow the procedure to align the antenna:
Power off the vertically polarized ODUs at both
ends of a radio link, power on the horizontally
polarized ODUs at both ends of the radio link. This
ensures that the antennas at both ends transmit
horizontally polarized signals.
Adjust the azimuth and elevation of the antennas
at both ends by referring to the description in
“Aligning Single-Polarized Antennas”, and ensure
that the main lobes of the horizontally polarized
signals are aligned with the antennas.
32
Use a multimeter to measure the RSL (P1) on the RSSI port of the horizontally polarized ODU at the local
end.
Power on the vertically polarized ODU at the local end. Use a multimeter to measure the RSL on the
RSSI port of the vertically polarized ODU. Release the holder of the feed boom gently, and turn the feed
boom gently until the RSL reaches the minimum value (P2). The calculated XPD1 (XPD1 = P1 - P2)
cannot be less than 24 dB. Record the current angle (D1) of the feed boom.
Power off the horizontally polarized ODUs at both ends of the radio link, and power on the vertically
polarized ODUs at both ends of the radio link. Adjust the azimuth and elevation of the antennas at both
ends by referring to the description in “Aligning Single-Polarized Antennas”, and ensure that the main
lobes of the vertically polarized signals are aligned with the antennas.
Refer to Steps 3 and 4 to ensure that the calculated XPD2 (XPD2 = P3 - P4) is equal to or more than 24
dB. Record the current angle (D2) of the feed boom.
Repeat Steps 1 to 6 to adjust the feed boom gently (ranging from D1 to D2), and ensure that XPD1 and
XPD2 are equal to or more than 24 dB.
Tighten all the screws of the antennas after the alignment is completed.
Checking the Radio Link Status
LINK indicator
Check the status of the LINK indicator on the IF board.
a
b
c
d
If the LINK indicator is on (green), the radio link is functioning properly.
If the LINK indicator is on (red), check whether the configuration data is correct. If the configuration data is
incorrect, configure correct data.
If the LINK indicator blinks yellow at intervals of 300 ms, check whether the antennas are aligned properly. If the
antennas are not aligned properly, realign the antennas.
If the LINK indicator is off, check whether the logical units of the IF unit and the ODU have been added on the
NMS. If yes, check for a fault in the IF jumper, IF cable, or the ODU.
33
Checking the Installation
No.
What to Check For
1
The chassis must be installed securely in the position as specified in the engineering design documents.
2
Each chassis component does not have any paint drop, damage, or stain. Otherwise, re -paint or clean the
component.
3
For a board inserted into the chassis, the screws on the front panel are tightened.
4
Filler panels are installed for vacant slots in the chassis.
5
Cable routes comply with the engineering design documents and facilitate maintenance and expansion.
6
Cables are not damaged, broken, or jointed in between.
7
Each core of the cables is tested for connectivity.
8
Cables are properly bound. Cable ties are installed at equal spacing and in the same direction. The excess of
cable ties is trimmed off without remaining rough edges.
9
Signal cables are routed correctly in the cabinet.
10
Cables outside the cabinet are routed as follows:
• The cables are placed tidily and are not cross -connected.
• If a cabling ladder is used, the cables are bound onto the ladder beam tidily. If the cabling frame is 0.8 m or
more higher than the cabinet top, a cabling ladder is available on the cabinet top to support the cables and to
ease stress.
11
Cable turns are smooth and have a great bending radius.
12
Cable labels are filled in correctly and attached securely. They are aligned and face to the
same direction. Preferably, the labels are attached 2 cm away from the connectors.
13
The power cable and ground cable are routed separately from the signal cables.
14
Idle cable connectors are protected. For example, protective caps are installed on the idle connectors.
15
Protective tube for fiber jumpers are routed into the cabinet for 10 cm and bound securely.
16
The cuts of protective tubes for fiber jumpers are smooth. Otherwise, they need to be wrapped by an insulation
tape.
17
Fiber jumpers are bound gently to ensure free move in the cable tie.
18
Connecting points of fiber jumpers are clean. Protective caps (plugs) are installed for idle fiber connectors and
optical ports.
34
Appendixes
1 Installing Power Cables for the C3 PDU
a
Installing and Routing the Power Cables – DC Power Distribution Box
Power output area
Power switch area
Power input area
A
A
48 48
V V
G
N
D
G - G
N 48 48 N
D V V D
SW1
G N 48 48
D V V
SW2
Item
Input
power
Output
power
G
N
D
G N 48 48
D V V
SW3
G
N
D
G
N
D
SW4
S S S S
WWWW
1 2 3 4
Power switch area
Specifications
Rated input voltage
-48 V DC to -60 V DC
Input voltage range
-38.4 V DC to -72 V DC
Input mode
2 DC power inputs from different power facilities
Maximum input current
A maximum of 80 A current for each power input
Input terminal type
M8 OT terminal
Rated output voltage
-48 V DC to -60 V DC
Output voltage range
-38.4 V DC to -72 V DC
Number of power outputs
Eight power outputs under control of four circuit breakers.
For the OptiX RTN 980 equipment, one circuit breaker is
required to control one power output.
Maximum current of each circuit
breaker
40 A
Output protection
The overcurrent protection function is available, but
manual recovery is required.
Output terminal type
Cord end terminal (12-10AWG)
35
b
Installing Mounting Ears for the C3 PDU


Installing the C3 PDU in a 19-inch cabinet
Installing the C3 PDU in an ETSI cabinet
NOTE
By default, the C3 PDU is installed in a 19-inch cabinet. When the C3 PDU is installed in an ETSI cabinet, the
mounting ear needs to be removed and then installed in another direction.
When the C3 PDU is installed in an ETSI cabinet, the mounting ear needs to be installed based on the
requirement.
36
Connections Between Power Cables
NOTE
Pow er cable for the subrack
PGND cable
C3 PDU can be used only in the central
telecommunications room. A maximum of two RTN
980 NEs can be installed in a cabinet.
A
B
Cover
A
B
PGND cable
RTN (+)
NEG (-)
PIU boards in 1+1 hot backup mode
MD1
c
Ensure that the circuit breaker of the PDU is set to the OFF state. Insert the DC connector into the power port
of the PDU. Ensure that the two groups of power cables are connected to different wiring terminals,
37
2 Assembling Cable Connectors
a
Assembling OT Terminals and Power Cables
• Components of an OT terminal and a power cable
Wire stripper
A
B
Heat gun
C
D
A Heat shrink tube
B Bare crimp terminal
C Insulation layer of a power cable
D Conductor of a power cable
• Installation procedure
1
2
L
A
C
B
L2
B
C
L1
D
Strip a part of the insulation layer C of the power
cable according to the cross -sectional area of the
conductor, and ensure that the conductor D of the
power cable is exposed for the length L1.
Route the power cable into the heat shrink tube A.
Route the exposed conductor of the power cable into
the OT terminal B, and then remain the OT terminal
close to the insulation layer C of the power cable.
CAUTION
When stripping the insulation layer of a power cable, do not damage the metallic conductor of the power cable.
If the bare crimp terminal is not provided by Huawei, change the value of L1 according to the actual value L of
the bare crimp terminal. L1 = L + (1-2) mm.
After the conductor is routed into the OT terminal, the exposed part L2 of the conductor of the power cable
cannot be more than 2 mm.
38
3
4
Crimp the joint parts of the bare crimp terminal and
the conductor of the power cable by using a crimping
tool.
Push the heat shrink tube A towards the connector until
the heat shrink tube covers the crimped parts of the bare
crimp terminal and the conductor of the power cable.
Then, heat the heat shrink tube by using a heat gun.
NOTE
The shapes of the crimped parts may vary according to the types of crimping dies.
CAUTION
Do not heat the heat shrink tube for a very long time to avoid damage to the insulation layer.
b
Assembling Cord End Terminals and Power Cables
Wire stripper
• Components of a cord end terminal and a power cable
B
C
A
39
Crimp pliers for the
cord end terminal
• Installation procedure
1
2
L1
B
B
A
C
A
Strip a part of the insulation layer B of the power
cable according to the cross -sectional area of the
conductor, and ensure that the conductor C of the
power cable is exposed for the length L1.
Route the conductor of the power cable into the cord
end terminal A, and then align the conductor with the
edge of the cord end terminal.
CAUTION
When stripping the insulation layer of a power cable, do not damage the metallic conductor of the power cable.
After the conductor is fed into the cord end terminal, the exposed part of the conductor of the power cable
cannot be more than 1 mm long.
3
4
H
W2
W1
A
3 Crimp the joint parts of the cord end terminal and the
conductor of the power cable based on a proper
cross-sectional area by using a crimping tool.
管状端子截面积
（mm2）
0.25
0.5
1.0
1.5
2.5
4
6
10
16
Cross-Sectional Area (mm2)
端子的最大压接宽度
Maximum Width (mm)
（mm）
1
1
1.5
1.5
2.4
3.1
4
5.3
6
4 After crimping the terminal, check the maximum width of
the terminal, which needs to be less than the maximum
width specified in the table.
40
HUAWEI TECHNOLOGIES CO., LTD.
Huawei Industrial Base Bantian Longgang
Shenzhen 518129
People’s Republic of China
www.huawei.com