Nortel Networks BCM200/400 - Manual (Page 110)

110 Chapter 8 Installing a media bay module (MBM)
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Selecting station MBMs
The number and type of telephones and related equipment you have determines which station
MBMs you require.
To select station MBMs
1 In Table 26 , record the number of each type of extension you have.
2 Use the number of extensions and the number of extensions per MBM to determine how many
MBMs you need.
For example, in North America:
• If you require 12 digital extensions, you need 1 DSM16/DSM16+
• If you require 24 digital extensions, you need 1 DSM32/DSM32+
Note: If you are adding any extensions in the near future, include them in your
calculations.
Table 26 Determine station MBMs requirements
Type of extension
Number of
extensions
Type of MBM
Number of extensions
per MBM Number of MBMs
required
Digital extensions DSM16/DSM16+ 16 _____ DSM16
Digital extensions DSM32/DSM32+ 32 _____ DSM32
Digital extensions 4x16 or 8x16 16 _____ DSM16
Analog extensions ASM8 8 _____ ASM8
Analog extensions GASM8 8 _____ GASM8
Specialty modules
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 the telephones that can be used with the BCM system, refer to
“Telephones and
adapters” on page 75 .
Analog extensions include single-line telephones, fax machines, and modems.
Note: If you require only a few analog extensions, you can use an ATA 2 to connect these
devices to your DSM16(+), DSM32(+), or the DSM connector on a 4x16 MBM. Each
analog extension requires an ATA 2.