Preparing Oc Or Stm Fiber Distribution Cables - Nortel Passport 15000 Hardware Description

Preparing OC or STM fiber distribution cables
The fiber distribution cables connect the ports on the function processors
(FPs) to a termination port. The customer must supply the fiber distribution
cables for the Passport 15000 or 20000.
The fiber cable connectors for Passport 15000 or 20000 FPs are the LC,
MT-RJ, or SC type. Choosing the type of cable and connectors for a fiber
optic FP depends on the terminations at both ends. You must provide the
cables and connectors that link the FPs to the far end. The 16-port OC-3/
STM-1 cards have either LC or MT-RJ connectors. See the figures "A duplex
cable assembly with LC-to-LC connectors" (page 333) and "Cable assembly
with an MT-RJ fiber connector and a duplex SC connector" (page 334).
Handling any system cable is described in 241-1501-240 Passport 15000,
20000 Hardware Installation, Maintenance and Upgrade.
Single-mode FPs at both ends can operate with either multimode or single-
mode fiber cables. The difference in performance depends on the length of
fiber cable. Multimode FPs at both ends can operate with only multimode
cables.
The length of a fiber cable is determined from the exact path of fiber from its
port on an FP to its termination port. The path depends on
• where the FP is located in the NEBS 2000 frame (the node, the shelf, and
the slot)
• which way along the cable management channel on the Passport 15000
or 20000 that the cables continue their path; fiber cables can go in either
direction
• whether the cabling is routed along the side of the frame (or equivalent
mounting apparatus) under the floor or through an overhead trough
• whether there is an optional fiber management unit NTHW50 for slack
control
• whether you use a fiber patch panel between the termination ends
• what the angle of connection is at each termination port
• where the far-end termination port is located
Chapter 6 Cables and cable management 331
Passport 15000, 20000 Hardware Description 5.2S2