Nortel BCM200 Installation And Maintenance Manual page 58

58 Chapter 2 Introducing the BCM hardware
Table 9 Station MBMs (Sheet 2 of 2)
MBM
ASM8+/GASM
(see "Analog station media bay modules"
on page 59)
Note: Refer to "Market profile attributes" on page 355
Digital station media bay module
The digital station media bay modules (DSM) support digital telephones on the BCM system. This
section describes the DSM16(+) and DSM32(+) MBMs (see
The DSMs have the following characteristics:
• DSM16(+) — supports 16 digital telephones through one RJ-21 connector. Set the double
density switch to enable the DSM to carry 16 extensions over a half DS30 bus. If required,
install a second DSM16(+) and set the double density switch to occupy the second half of the
DS30 bus to expand the number of extensions to 32.
• DSM32(+) — supports 32 digital telephones through two RJ-21 connectors. A DSM32(+)
operating in single-density mode occupies two DS30 buses. Set the double density switch to
enable the DSM to carry 32 extensions over a single DS30 bus.
Note: Devices that share a DS30 bus must be similar. Use two DSM16(+)
module in double density mode on a single DS30 bus. Do not mix a DSM16(+)
module with a DSM32(+) module over a single DS30 bus.
Figure 32 DSM faceplate LEDs and connectors
N0060612 N0060612
What it does
Connects a maximum of eight analog
devices to the BCM system.
The GASM provides the following
additional services: caller ID, pass
through, message waiting indication, and
disconnect supervision at the telephone.
The GASM also allows you to download
new firmware.
DSM 16(+)
for supported regions.
Figure
Special notes
32).
DSM 32(+)