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78 Chapter 1 Introduction to the Business Communications Manager Platform Hardware
P0993133 03
Station Media Bay Modules
Install the station media bay modules in the base function tray or the Business Communications
Manager expansion unit. Station media bay modules connect telephones and analog
telecommunication devices to the Business Communications Manager system.
Table 11 provides a list of the station modules available by region:
Digital station media bay module (DSM)
Three types of media bay modules support digital telephones on the Business Communications
Manager. This section describes the two DSM modules. Refer to Figure 43 on page 79.
• Digital Station media bay module (DSM 16+) supports 16 digital telephones. Set the full
double density (FDD) switch to enable the module to carry 16 extensions over a half DS30
channel. If required, install a second DSM 16+ and set the FDD switch to occupy the second
half of the DS30 channel (setting the FDD switch) to expand the number of extensions to 32.
• Digital Station media bay module (DSM 32+) supports 32 digital telephones through two
amphenol connectors. Set the full double density (FDD) switch to enable the module to carry
32 extensions over a half DS30 channel. If required, install a second DSM 32+ and set the
FDD switch to occupy the second half of the DS30 channel (setting the FDD switch) to
expand the number of extensions to 64.
• 4X16 supports 16 digital telephones and does not require a separate trunk module.
Refer to “4X16 Media Bay Module” on page 79.
Table 11 Station module regional availability
Module type What it does Availability
DSM 16+
“Digital station media bay module
(DSM)”
DSM 32+
“Digital station media bay module
(DSM)”
Connects a maximum of 16 digital
telephones
Connects a maximum of 32 digital
telephones to the Business
Communications Manager system.
4X16
Combination 4-line CTM and
DSM16 (4x16) Media Bay Module
“4X16 Media Bay Module”
Connects a maximum of four CLID lines
for a maximum of 16 digital telephones
Only available for North American
systems. This module can be
combined with CTMs on the same
DS30 channel.
ASM8
“Analog station media bay
module”
Connects a maximum of eight analog
devices to the Business Communications
Manager system.
Only available for North American
systems.
Note: Devices that share a DS30 channel must be identical. Use two DSM 16+
modules in full double density mode on a single DS30 channel. Likewise, use two
DSM 32+ modules in full double density mode on a single DS30 channel.