Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 792 / 874

792 Chapter 17 Hardware procedures
241-1501-240 5.2S2
Replacing a fiber cable in a fiber management unit
Replace a fiber cable in a fiber management unit to repair a damaged fiber tray
or drawer.
Prerequisites
• You must be familiar with “Safety considerations and best practices”
(page 53).
• Replacing a fiber cable in a fiber management unit can be done by:
— removing the cable from end to end and routing the replacement
along the same path
— routing the replacement cable parallel to the original except for
using a vacant tray, and leaving the original installed with its
connectors cut off
Procedure steps
1 After the replacement cable is routed up to the outside of the fiber
management unit, measure the exact path that the fiber cable is intended
to be routed from the fiber management unit to the other end (non-FP)
connection. Measure from the side of the fiber unit where the fiber cable
will exit.
2 Using a piece of electrical tape, temporarily mark that distance on the
fiber cable from the unconnected end. Ensure that the tape can be easily
removed later, but will not move during minor handling.
3 At the fiber unit, locate the drawer that houses the cable being replaced.
4 Carefully open the drawer by sliding the latches towards each other, and
holding them there while pulling the drawer towards you. Stop pulling
when the rear of the drawer is at the front of the fiber unit. As the drawer
CAUTION
Risk of service loss or degradation
When fiber cables are clustered together, they typically
become entangled. Removing a cable from the cluster can
cause other cables to be pinched or crimped, which can
cause traffic to be lost. When your fiber cable setup has
space to route an additional cable, this method is preferred
over removing the original cable.