To Connect Analog Telephone Lines To The Gatm4 Or Gatm8; To Connect Extensions To Dsm16, Dsm32, Asm8, Or 4X16 Mbms; Connecting Extensions To The Expansion Units - Nortel BCM50 Installation And Maintenance Manual

106 Chapter 9 Connecting the cables to the BCM50 system
• If your BCM50 system has another expansion unit, repeat this procedure if you are adding
more telephone lines or proceed to
page 106
• If your BCM50 system does not have another expansion unit, proceed to
auxiliary equipment" on page

To connect analog telephone lines to the GATM4 or GATM8

1
Read the warnings in
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 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 supplied screws on the sides of the
connector to secure it.
• If you are using a right-angle RJ-21 connector, use the supplied 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 the supplied 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 expansion unit, repeat this procedure if you are adding
more telephone lines or proceed to
are adding extensions.
• If your BCM50 system does not have another expansion unit, proceed to
auxiliary equipment" on page
Refer to the following sections for information on wiring the trunk MBMs:
• "DTM wiring chart" on page 213
• "BRIM wiring chart" on page 215
• "GATM wiring chart" on page 217
• "4x16 wiring charts" on page 221

Connecting extensions to the expansion units

Extensions connect to the expansion unit through the connectors on the MBM installed in the
expansion unit.

To connect extensions to DSM16, DSM32, ASM8, or 4x16 MBMs

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 MBM.
N0027152 01 N0027152 01
if you are adding extensions.
107.
"Wiring warnings" on page
107.
"Wiring warnings" on page 103
"Connecting extensions to the expansion units" on
103.
"Connecting extensions to the expansion units"
section.
"Connecting the
if you
"Connecting the