Nortel Networks BCM50 manual Disconnecting the cables, Removing the expansion unit

184Chapter 23 Replacing an expansion unit

Refer to the following sections for information on replacing a expansion unit:

•“Disconnecting the cables”

•“Removing the expansion unit”

•“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

1Use Element Manager to disable the media bay module (MBM) that is installed in the expansion unit you are removing. Refer to the BCM50 Administration Guide (N0016868) for more information.

2Disconnect the expansion cable from the expansion port on the expansion unit.

3Disconnect the LAN cable from the LAN port on the expansion unit.

4Disconnect all of the telephone lines and extension cables from the MBM inserted in the expansion unit.

If there is more than one cable, mark the cables to identify the port from which they were removed.

5Rotate the power supply retention clip to free the power supply cord.

6Remove the power supply cord from the expansion 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.

7Continue with the next step, “Removing the expansion unit”.

Removing the expansion unit

The method you use to 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 rackmounted expansion unit” on page 185

•“To remove a wallmounted expansion unit” on page 185

•“To remove a desktop-mounted expansion unit” on page 185

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