Nortel Networks BCM50 manual To connect the lines and extensions

104Chapter 9 Connecting the cables to the BCM50 system

Danger: Electrical shock hazards

Electrical shock hazards from the telecommunications network and ac mains are possible with this equipment. To minimize risk to service personnel and users, the BCM50 system must be connected to an outlet with a third-wire ground. In addition, all unused slots must have blank faceplates installed. The covers on all units must be in place at the completion of any servicing.

Connecting lines and extensions to the RJ-21 telephony connector

You can connect 4 analog lines, 4 analog extensions, and 12 digital extensions to the RJ-21 telephony connector.

If you use the WFC to connect the lines and extensions to the RJ-21 telephony connector, refer to “Installing the wiring field card (optional)” on page 88 and “To connect the cables to the wiring field card (optional)” on page 111 for more information.

Warning: If you use the same phone line for both an analog trunk and a DSL line, you must install a DSL filter on the analog trunk to avoid interference with the DSL modem.

To connect the lines and extensions

1Read the warnings in “Wiring warnings” on page 103.

2Obtain a 25-pair cable with an RJ-21 connector on one end.

3Remove the appropriate side breakout from the cable management door:

•If this is the first unit on a BCM50 system with multiple units, remove the side breakout from the right side of the cable management door.

•If this is the center unit on a BCM50 system with more than two units, remove the side breakout from both sides of the cable management door.

4Plug the RJ-21 connector into the RJ-21 telephony connector on the main unit.

5Select the appropriate option to secure the RJ-21 connector to the main unit:

•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 main unit.

6Connect the four pairs of wires for the analog lines to the telephone company demarcation blocks of the building.

7Connect the four pairs of wires for the analog telephones to the local connecting blocks.

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