Mike's PBX Cookbook

BCM50 Expansion Unit

A BCM50 Expansion Unit (NT9T6402E5) increases the capacity of the system by providing somewhere to put a Media Bay Module (MBM). An Expansion Unit is required to add digital trunks to a system, such as BRI or PRI. Each Expansion Unit requires keycode activation.


BCM50 Expansion Unit

Connecting

The Expansion Unit connects to the Main Unit with a standard T-568B patch cord, shielded Cat5e cable (maximum length 10 meters) is recommended. Avaya call it a DS256 Cable (NTAB3304).

BCM50 Expansion Unit connection

The two Expansion ports are marked on the Main Unit. On the Expansion Unit, the Expansion port is the bottom connector. The upper connector is connected to the internal ethernet switch on the Main Unit. You can use this port to connect an additional device to the LAN.

Media Bay Modules

Refer to the following wiring charts: Station Module Wiring, Trunk Module Wiring, G4x16 Module Wiring, G8x16 Module Wiring.

If you are installing a DTM, BRIM, CTM4/8, ADID4/8, 4x16, DSM16/32(+), or ASM8, ensure that all the module DIP switches are on. This is the default setting.

If you are installing a GASM (Analog extensions), GATM (Analog Lines), or G4/8x16 module, set the right-hand switches all off (default North America, for the UK: set switch 8 on). The left-hand switches are all set to on (default). For other regions: check the documentation.

Supported Modules

The following Media Bay Modules are supported on the BCM50:

Digital Trunk Modules:

Analog Trunk Modules

Digital Station Modules

Analog Station Modules

Combination Modules

Special Modules

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