Nortel Passport 15000, Hardware Installation And Maintenance, Page: 773 / 874

Chapter 17 Hardware procedures 773
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
Removing fiber cables from the fiber management unit
Remove fiber cables from the fiber management unit in preparation for
replacing the unit, or one or more cables.
Prerequisites
• You must be familiar with “Safety considerations and best practices”
(page 53).
Procedure steps
1 Open the cable management unit drawer by sliding the latches towards
each other, holding them inwards and pulling slowly. Stop pulling when
the rear of the drawer is at the front of the fiber unit.
2 Ensure that the tray labels are complete.
3 Label the trays in the replacement fiber management unit to match the
one to be replaced.
4 Beginning with the topmost trays, carefully unwind the fiber cables from
around the half-spools.
If you are removing all the cables in order to replace the fiber
management unit, be sure to temporarily label each cable, so that it can
matched to the appropriate tray in the replacement unit.
You may need to remove the tie-wraps or curlie-ties from around the
bundle of fibers at the sides of the fiber management unit so that cable
slack is increased enough to allow unstressed handling of all the cables.