Nortel Networks BCM50 - Manual (Page 184)

184 Chapter 23 Replacing an expansion unit
NN40020-302
For information about replacing an expansion unit:
• Disconnecting the cables on page 184
• Removing the expansion unit on page 184
• Removing the MBM on page 186
• Inserting the MBM in the new expansion unit on page 186
• Installing the new expansion unit on page 187
Disconnecting the cables
Use the following procedure to disconnect the expansion unit from the other equipment.
To disconnect the expansion unit cables
1 Use Element Manager to disable the media bay module (MBM) that is installed in the
expansion unit. For more information, see the Administration Guide.
2 Disconnect the expansion cable from the expansion port on the expansion unit.
3 Disconnect the LAN cable from the LAN port on the expansion unit.
4 Disconnect all of the telephone lines and extension cables from the MBM inserted in the
expansion unit.
If more than one cable exists, mark the cables to identify the port from which you removed
them.
5 Rotate the power supply retention clip to free the power supply cord.
6 Remove the power supply cord from the expansion unit.
7 Proceed to Removing the expansion unit on page 184.
Removing the expansion unit
How you remove the expansion unit depends on how the unit is mounted. Use one of the following
procedures to remove the expansion unit:
• To remove a rack-mounted expansion unit on page 185
• To remove a wall-mounted expansion unit on page 185
• To remove a desktop-mounted expansion unit on page 185
Warning: Leakage currents
You must disconnect the telephony and data networking cables from the system before
disconnecting the power cord from a grounded outlet.