Gatm4 And Gatm8 - Nortel BCM50 Installation And Maintenance Manual

124 Connecting the lines and extensions
• If you are connecting a 4X16 MBM, go to
Units" on page 125
• If your BCM50 system has another BCM50 Expansion Unit, repeat this procedure if you
are adding more telephone lines or proceed to
Expansion Units" on page 125
• If your BCM50 system does not have another BCM50 Expansion Unit, proceed to
"Connecting the auxiliary equipment" on page

GATM4 and GATM8

To connect analog telephone lines to the GATM4 or GATM8:
1
Read the warnings in the
2
Obtain a 25-pair cable with an RJ-21 connector on one end.
3
Plug the RJ-21 connector of the cable into the RJ-21 connector on the front of the media bay
module (MBM).
4 Select the appropriate option to secure the RJ-21 connector to the MBM:
• If you are using a straight RJ-21 connector, use the two screws on the sides of the
connector to secure it.
• If you are using a right-angle RJ-21 connector, use the screw on the left side of the
connector to secure the left side of the connector. To secure the right side of the connector,
use a cable tie to fasten the 25-pair cable to the anchor on the MBM.
5 Connect the other end of the cable to the telephone company demarcation blocks of the
building.
6 Select the appropriate option for your system:
• If your BCM50 system has another BCM50 Expansion Unit, repeat this procedure if you
are adding more telephone lines or proceed to
Expansion Units" on page 125
• If your BCM50 system does not have another BCM50 Expansion Unit, proceed to
"Connecting the auxiliary equipment" on page
Refer to the following sections for information on wiring the trunk media bay modules:
• "DTM wiring chart" on page 231
• "DDIM wiring chart" on page 233
• "BRIM wiring chart" on page 235
• "GATM wiring chart" on page 237
• "4x16 wiring charts" on page 241
Connect the cables to the BCM50 system
for instruction about wiring the extensions for this MBM.
if you are adding extensions.
"Wiring warnings" on page 121
if you are adding extensions.
"Connect extensions to the BCM50 Expansion
"Connect extensions to the BCM50
125.
section.
"Connect extensions to the BCM50
125.