Caller Id Trunk Media Bay Module - Nortel BCM1000 Installation And Maintenance Manual

40 Chapter 2 Telephony hardware
There are two firmware versions of the GATM:
GATM4: The GATM4 provides connections for four analog calling line identification (CLID) or
Supervision Disconnect PSTN lines. Each voice line uses one line in the DS30 bus offset. Since
each DS30 bus has four lines per offset, you can assign a maximum of four GATM4s to a single
DS30 bus by making the offset switch settings different for each module.
GATM8: The GATM8 provides connections for eight analog calling line identification (CLID) or
Supervision Disconnect PSTN lines. Each line uses one line in the DS30 bus offset. Since each
DS30 bus has four lines per offset, you require two offsets for each GATM8. You can assign a
maximum of two GATM8s to a DS30 bus, by making the offset switch settings different for each
module. You can also combine a GATM 8 with a 4X16 module on the same DS30 number. When
you choose an offset number for the GATM 8, the system automatically adds the next offset
number. You cannot assign offset 3 to the GATM 8 module, because this does not allow the
module to assign the second set of lines.

Caller ID Trunk media bay module

(North American systems only)
The CTM and CTM 8 have the same functions.
• The Caller ID Trunk media bay module (CTM) connects a maximum of four analog calling
line ID (CLID) interfaces to the Business Communications Manager system via four RJ11
jacks on the module face. These jacks are labeled: Line 1, Auxiliary, Line 2, Line 3, and Line
4. The auxiliary jack connects to Line 1.
• The CTM8 provides eight analog CLID interfaces to the Business Communications Manager
via eight RJ11 jacks on the module face. Each jacks also supports disconnect supervision.
There are two auxiliary jacks on this module which connect to Line 1 and Line 5. Note that the
top line of jacks is numbered in reverse order.
The auxiliary ports permit you to connect a V.90 modem, FAX machine, or single-line analog
telephone. When the auxiliary device is active, the Business Communications Manager system
blocks the associated line. Conversely, when the line is active, the auxiliary port line is blocked.
When you connect a single line analog telephone to the auxiliary port, you can use it as an
emergency telephone because this line remains active if a power outage occurs.
Figure 17 provides a view of the front of the CTM and CTM8.
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