Telecom Networks
FIST-SOSA/SASA Trays
February 2012
What is Fiber Cable Management
IEC 61756-1 and ITU-T L.51 defines a fiber management system as a
system that provides:
• Storage of fiber splices and optical components.
• Overlength storage of fiber and cable with correct bending radius.
• Protection.
• Identification.
• Optical stability by separation of optical circuits when necessary.
page 2 /
ITU L.17 recommendation
page 3 /
Definitions
Network Element
Single Element
Single Circuit
Positive Fiber
Management
• A product with a specific optical function
e.g. splicing point to connect internal to external cable
• Unit of fiber handling in the cable construction
e.g. 12 fibers in a loose tube
• Number of fibers required per ONU in the network
e.g. 2 fibers for a bi-directional service with simplex
transmission
• Physical cable and fiber routing design that
1. provides for clear one way installation
2. avoids transmission errors during normal cable
and element handling
e.g. well engineered bend radius control throughout
the network
page 4 /
Why Circuit Separation in a Fiber Management
System
In the optical fiber networks:
• Optical fiber is subjected to handling.
• Losses will occur by manipulation of active optical circuits.
• The losses have the probability of being system affecting.
• Losses are transient in nature.
INCREASED PROBABILITY OF TRANSMISSION ERRORS
page 5 /
Definition of Transient Optical Loss
0.5
Residual loss
0.0
Optical Power ( dBm)
-0.5
-1.0
-1.5
Transient Loss
-2.0
-2.5
-3.0
-3.5
0
0.5
1
1.5
2
Time ( sec )
page 6 /
Transient Loss versus Bit Errors
Results of Transients in STM 64 System (1550 nm)
• At high system margin of 9 dB: No errors for transients up to 8 dB
• At low system margin of 1 dB: Bit errors seen for:
Transient loss
(dB)
0.6
1
3.5
4.5
5
5.5
6.5
8
8.5
Type of Error
B1
B1,B2
B1,B2,B3
B1,B2,B3,REI
B1,B2,B3,REI,TIM
B1,B2,B3,REI,TIM,SYNC
B1,B2,B3,REI,TIM,SYNC,OOF
B1,B2,B3,REI,TIM,SYNC,OOF,LOF
B1,B2,B3,REI,TIM,SYNC,OOF,LOF,LOS
Bits
Bits
Bits
Remote Error Identification
Trace Identifier Mismatch
Synchronization Loss
Out of Frame
Loss of Frame
Loss of Signal
0.5 dB transient peak loss requirement seems good selection criteria
(confirmed by Telcordia – see proceedings NFOEC 2003)
page 7 /
Features Fiber Cable Management System
• Single Circuit Management
• Positive Fiber Management
• Future Proof
• Network Flexibility
• Improved Quality of Service
• End-to-End Solution
• Cost Effective
page 8 /
FIST MK2 Organizer Building Blocks
Universal
Mounting
System
profile
(UMS)
Ribbon 12 tray
Wrap-around groove plates
for Ribbon 12
Ribbon 4/8 tray
for Ribbon 4/8
(Single Element)
SE tray
for single fiber
SC tray
(Single Circuit)
FAS routing-block cap
tube
FAS routing-block
holder
page 9 /
Universal Mounting System (UMS)
• Base frame to click-in organizer systems
e.g. routing blocks and wraparound
groove plates
• Mounted in all splicing network elements
• Precision made iodinated alu frame
• Allows modular and as needed
built of infrastructure
page 10 /
Wraparound Groove Plate for 250 Single Fiber
• Optical guide and mechanical protection for and 900 micron fibers
• Single circuit or single element trays
• 4 units and 8 units length
• Easy click-in system to UMS
• One-direction routing
• Break-off edge when
using pigtails
• Always supplied with trays
(SOSA2-XSC or SE)
page 11 /
Single Circuit Tray
• Handles up to 4 primary coated fibers
• Handles 2 secondary coated fibers
• Modular splice holder area
• Minimum bend radius of 30mm
• Loop back facility
• Integrated identification
• 1 UMS unit thick
page 12 /
Single Element Tray
• Handles up to 12 primary coated fibers
• Handles 4 secondary coated fibers
• Modular splice holder area
• Minimum bend radius of 30mm
• Loop back facility
• Integrated identification
• 2 UMS units thick
page 13 /
Oval Bend Indicator in SC and SE Tray
• Stored fibers should not touch the oval bend indicator at the above indicated
points!
Wrong
max
Correct
min.
page 14 /
Passive Device housing
• Housing for pre-installed passive optical devices
• Compatible with planar and FBT devices
• 1:2 up to 2:32 devices (nxm)
• Supplied with SASA sub-assembly
• 2 UMS units thick
page 15 /
SASA (splitter array sub-assembly)
FIST-SASA2-XX-YY-Z
• X X= input/output ports splitter
• Y Y= # of splitters and grade
•Z
= type of spliceholder
Packed per piece ; fibers pre-routed
to SC trays - assembled on base plate
page 16 /
Types of Configuration in Organizers
page 17 /
SASA2-14-1X-X
• Network scheme
page 18 /
SASA2-24-2X-X
• Network scheme
page 19 /
SASA2 TAM (test access module)
• Network scheme
page 20 /
SASA2 type : MERGER
• Network scheme
page 21 /
Routing Block
• Routes fibers in a controlled way to the appropriate tray
• Mechanical protection of installed fibers by a routing block cap
• Easy click-in system to UMS at any position; typically pre-installed
• 2 sizes
page 22 /
Fiber management technique and capability
• Fibers are routed up or down in
groove plate; not both directions in
one side-duct
• Parallel running fibers allow transient
controlled management
• Below point 1 transient controlled
addition of fiber
• Feed-through hole allows transient
controlled
Fiber addition
Re-configuration by pull back technique
page 23 /
Tube Holder for Boxes and Closures
• Termination point for cable tubes
• Compatible with any size of cable tubes up to 6.4mm
• Snap-in tube holder retainer
page 24 /
Tube holder for subracks
• Termination point for pre-installed
transportation tubes
• One type for up to 27 tubes of 3.1mm in
diameter. Each tube can handle 24
fibers of 250 micron
• One type for up to 10 tubes of 5mm in
diameter. Each tube can handle x
ribbons of 4 fibers or x ribbons of 12
fibers
page 25 /
Fiber Routing
• Access from all corners possible due to design of Routing block
out
trench
in
trench
out
trench
in
trench
out
trench
in
trench
out
trench
in
trench
out
trench
out
trench
in
trench
in
trench
out of
the hole
page 26 /
Wraparound KTU
• Kevlar termination unit for single fiber
or ribbon pigtails
• Mechanical retention up to 70N
• Two single fiber pigtails or one ribbon
pigtail per KTU
• Single fiber pigtails up to 3.1mm in
diameter
• Snap-in design to KTU bracket or
retainer
page 27 /
Storage basket
• For mass storage of looped fibers in
closures and boxes in case of slotted
core or central core cable
• 2 sizes
• Stored with hinge in between or under
the UMS/ WA groove plate assembly
page 28 /
A Place for Everything
• Fiber pin assembled on tray lid
• Tube holder retainer assembled
on tray lid
• Tray lid assembled on
routing block
• Tray wedge assembled on
routing block
page 29 /
From ribbons to individual pigtails
• De-ribbonize in field
• Ribbonize in field
• Use factory made and pre-installed
fan-out
In GPST-12 patching trays
In GMS2 splicing trays
page 30 /
Organizer ordering items
• FIST-SOSA2-XX-Y
• FIST-SASA2-XX-YY-Z
• FIST-GMS2-FORXX-XX-X
• FIST-GB2-FORXX-XX-X
• FIST-PTK2
• FIST-KTU2
• FIST-ADK-H1-4
• FIST-BASKET-A
• FIST-BASKET-B
page 31 /
End of Presentation
February 4, 2012