Preparing the system for maintenance, Removing the main unit, To disconnect the cables – Nortel Networks BCM50 User Manual
Page 176
176
Chapter 21 Replacing a main unit
NN40020-302
For information about replacing the BCM50 main unit:
•
Preparing the system for maintenance
•
•
Preparing the system for maintenance
In most cases, if the BCM50 main unit is faulty, the system is already shut down. If this is the case,
continue with the procedure
on page 176. If the system is still operating,
perform the procedure
To disconnect the cables
1
Remove the 25-pair cable from the RJ-21 telephony connector on the front of the main unit.
2
Remove the Ethernet cable from the LAN port.
3
If the main unit is a BCM50a or a BCM50e, remove the Ethernet cable or ADSL line from the
WAN port and the Ethernet cables from the Router card LAN ports.
4
Remove the expansion cables or LAN cables from the expansion ports on the main unit. For
the expansion cables, make sure you mark the cables with the number of the port to which they
connect.
5
If the system uses the external Music Source port, remove the cable from the Music Source
port.
6
If the system uses a UPS, remove the USB cable from the USB port.
7
Rotate the power supply retention clip to free the power supply cord.
8
Remove the power supply cord from the main unit.
9
Removing the main unit
The method you use to remove the main unit depends on how the unit is mounted. Use one of the
following procedures to remove the main unit:
•
To remove a rack-mounted main unit
•
To remove a wall-mounted main unit
•
To remove a desktop mounted main unit
Warning: Leakage currents
You must disconnect the telephony and data networking cables from the system before
disconnecting the power cord from a grounded outlet.