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Chapter 2
Media Bay Modules
When setting up a BCM network you need to decide which MBMs you require. The following
provides information on the capacity of trunk modules, and station modules, used on the BCM
network.
Table 1
is a list of the trunk modules, and the number of lines each one provides.
Table 1 MBM trunk requirements
Type of lines
T1 digital
Universal T1 MUX digital lines
PRI digital lines (NA)
E1 digital lines
PRI digital lines (EMEA)
Analog lines
Analog lines
Analog lines
Analog lines
Analog lines
BRI ISDN lines
Table 2
provides a list of station modules and the number of extensions supported by each.
Table 2 MBM station requirements
Type of extension
Digital extensions
Digital extensions
Digital extensions
Analog extensions
Analog extensions
Specialty modules
Cordless handsets (DECT) (selected
profiles only)
Digital extensions are digital or IP telephones. You do not need to include IP telephones when calculating the number
of required DSM MBMs. For a list of telephones that can be used with the BCM system refer to the BCM 4.0 Device
Configuration Guide (N0027146).
Type of MBM
DTM
DDIM
DTM
DTM
DTM
CTM4 (North American systems only)
CTM8 (North American systems only)
GATM4
GATM8
4x16 combination MBM (North
American systems only)
BRIM S/T
Type of MBM
DSM16/DSM16+
DSM32/DSM32+
4x16
ASM8
GASM8
DSM
Number of lines per MBM
24
24 (also requires a full DS30 channel for
the data module)
23
30
30
4
8
4
8
4 (also requires a full DS30 channel for
the DNs)
4 ISDN loops
Number of extensions per MBM
16
32
16
8
8
32
BCM 4.0 Telephony Device Installation Guide
17
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