Nortel Networks BCM50 manual Connecting the power supply, Default line and extension numbers

100Chapter 9 Connecting the cables to the BCM50 system

The expansion port you select determines the line and extension numbers of the devices connected to the expansion unit. Refer to Table 19 for the default line and extension numbers.If you have a second expansion unit, repeat steps 1 to 3 for the second unit.

Table 19 Default line and extension numbers

	Default		Default
	extension numbers*		line numbers*
	Digital: 221 – 232		061 – 064
Main unit	Analog: 233 – 236
Expansion port 1	237	– 268	065 – 094
Expansion port 2	269	–300	095 – 124

* The number and type of lines and extensions that are available on the expansion ports is determined by the MBM you install in the expansion unit.

Connecting the power supply

An uninterruptible power supply (UPS) is an optional device that you connect to your BCM50 system. The UPS provides battery backup for the BCM50 system to maintain continuous operation during power interruption or failure conditions. For more information about the UPS, refer to “Uninterruptable power supply” on page 50.

When connecting a UPS, you must use a USB hub between the UPS and the BCM50 system.

Note: For the UPS to function correctly, it must be connected before the BCM50 system is powered up. If you connect a UPS to a running system, the UPS will not function.

Note: International (non-North American) users might require the power supply adapter cord to connect the power supply to the special power bar. Refer to the Appendix, “System region attributes” on page 229 for more information.

Figure 44 on page 101 shows how to connect the UPS.

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