Nortel Networks manual Introducing the BCM50 hardware Station MBMs Sheet 2, Dsm

Chapter 2 Introducing the BCM50 hardware 43

Table 4 Station MBMs (Sheet 2 of 2)

Module type	What it does	Special Notes
ASM8	Connects a maximum of eight analog	North America only.
“Analog station media bay modules”	devices to the BCM50 system.	Refer to “System region
		attributes” on page 229 for
		supported regions.
GASM	Connects a maximum of eight analog	North America only.
“Analog station media bay modules”	devices to the BCM50 system.	Refer to “System region
	This module provides the following	attributes” on page 229 for
	additional services: caller ID, pass	supported regions.
	through, message waiting indication, and
	disconnect supervision at the telephone.
	This module also allows you to download
	new firmware.

Digital station media bay module

The digital station media bay modules (DSM) support digital telephones on the BCM50 system. This section describes the DSM16+ and DSM32+ media bay modules (see Figure 10).

The digital station media bay modules have the following characteristics:

•DSM16+ — supports 16 digital telephones through a single RJ-21 connector.

•DSM 32+ — supports 32 digital telephones through two RJ-21 connectors.

•4x16 — supports 16 digital telephones as well as four analog public switched telephone lines.

Figure 10 DSM faceplate LEDs and connectors

DSM 16 DSM 32

4x16 media bay module

(North American systems only)

The 4x16 provides both analog trunk connections and connections to digital telephones. This media bay module (MBM) provides connections for four analog trunk lines and 16 digital telephones. Each of the four analog trunk lines support Caller ID and disconnect supervision. An Aux port beside Line 1 allows you to use an analog telephony device, such as a modem, fax, or telephone, to share the trunk.

Figure 11 on page 44 shows the 4x16 MBM. The 4x16 MBM has one RJ-21 connector and five RJ-11 connectors on the faceplate.

BCM50 Installation and Maintenance Guide