Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 814 / 874

814 Chapter 17 Hardware procedures
241-1501-240 5.2S2
Replacing the alarm/BITS module in a Passport 15000
Replace an alarm/BITS module in a Passport 15000 to restore external timing
signals to the CPs or sending the shelf alarm data to the alarm module.
Replace the module only by instruction from Nortel Networks technical
support.
Prerequisites
• You must be familiar with “Safety considerations and best practices”
(page 53).
• Contact Nortel Networks technical support and obtain a case number for
replacing the alarm/BITS module. Record the case number on the shelf
near the replaced module. Once the timing is successfully restarted,
contact Nortel Networks technical support to close the case number.
• The PEC for an alarm/BITS module in a Passport 15000 is one of:
— NTHR12 for balanced DS1 (shielded twisted pair), matched with CP
type NTHR06 or NTHW06
— NTHW76, for the external sync cable wire-wrap assembly
NTHW75 (matched to the DS1 CP type NTHR06 or NTHW06)
— NTHR13 for balanced E1 (shielded twisted pair), matched with CP
type NTHR35 or NTHW08
— NTHR14 for unbalanced E1 (coax), matched with CP type NTHR35
CAUTION
Risk of equipment damage or service loss
Inserting a replacement alarm/BITS module in a
Passport 15000 can cause equipment damage to the
switch. The modules have no serviceable parts. Cut the
seal and remove the module only if you have been
instructed to by Nortel Networks technical support.