Telephone System Installation and Maintenance Guide

Chapter 2 Introducing the BCM50 hardware 43
BCM50 Installation and Maintenance Guide
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
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.
ASM8
“Analog station media bay modules”
Connects a maximum of eight analog
devices to the BCM50 system.
North America only.
Refer to “System region
attributes” on page 229 for
supported regions.
GASM
“Analog station media bay modules”
Connects a maximum of eight analog
devices to the BCM50 system.
This module provides the following
additional services: caller ID, pass
through, message waiting indication, and
disconnect supervision at the telephone.
This module also allows you to download
new firmware.
North America only.
Refer to “System region
attributes” on page 229 for
supported regions.
Table 4 Station MBMs (Sheet 2 of 2)
Module type What it does Special Notes
DSM 32
DSM 16