Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 76 / 874

76 Chapter 4 Alarm/BITS module
241-1501-240 5.2S2
Alarm/BITS module replacement
Replace an alarm/BITS module to restore monitoring for alarms and sending
the building integrated timing supply (BITS) signal to the CPs. Do not replace
an alarm/BITS module on a Passport 15000 without first contacting Nortel
Networks technical support.
• “Prerequisites to alarm/BITS module replacement” (page 76)
• “Alarm/BITS module replacement task flow” (page 76)
Prerequisites to alarm/BITS module replacement
• Some of the procedures in this task are not located in this NTP. Ensure
you have access to 241-5701-600 Passport 7400, 15000, 20000
Configuration Guide and 241-5701-520 Passport 7400, 15000, 20000
Troubleshooting and Testing.
• The task of replacing an alarm/BITS module is different for
Passport 15000 and Passport 20000. Passport 15000 requires that you
remove the top fabric card (fabric X) to allow you to properly align the
connectors of the replacement alarm/BITS module.
• The name of a Passport 15000 or 20000 is identified on the front of the
switch hardware. The front of an older Passport 15000 is blank.
• Following the replacement, have the software operator restore the former
timing setup and verify that the network synchronized timing is restarted.
• While the alarm/BITS module has failed or is removed, there is no:
— BITS timing signal sent to the control processors (CPs)
— reporting of fabric LED status to the software
— reporting of any cooling unit alarms to the CPs
— reporting of any CP alarms to the breaker interface panel (BIP)
Alarm/BITS module replacement task flow
This task flow shows the sequence of procedures and tasks to replace an
alarm/BITS module in your Passport 15000 or 20000 switch. To link to any
procedure or task, go to “Task flow navigation” (page 77).