Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 605 / 874

Chapter 17 Hardware procedures 605
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
Installing fiber cables through the fiber management unit
Install fiber cables through the fiber management unit to manage cable slack
in the connection path between FPs and their next connection.
Prerequisites
• You must be familiar with “Safety considerations and best practices”
(page 53).
• The fiber management unit (NTHW50) must already be installed into a
NEBS 2000 frame or equivalent.
• FPs must already be installed (not necessarily powered up).
• Ensure easier installing, load balancing, and planning for maintenance by
following this logical method of cabling the fiber management unit:
— install each fiber cable one at a time completely from end to end
— route all cables from each FP faceplate one after another from
bottom to top
— route the fiber cables from the optical FP closest to the fiber unit,
then continuing with each further optical FP
— start at the bottom drawer of the fiber unit and continue upwards
— use the trays front to rear on the same side, then the other side, and
always from the bottom to the top tray
— route each cable into a tray at the rear corner and exit the same corner
(the trays are symmetrical to accommodate left and right access at
the rear)
CAUTION
Risk of damage to fiber cables
Connecting the ends of a fiber cable to its terminations and
then looping the middle portion of the cable into the fiber
management unit causes twisting of the fiber cable.
Twisting a fiber cable can break the fiber inside. Avoid this
by using the unidirectional method of installation in the
following procedure.