AT&T 3.0 manual Labeling Trunks, Installing the Channel Service Unit

Labeling Trunks

6If you find a central office trunk that does not have dial tone, check for a bad adapter or loose connection.

If adapters and wiring are in working order but you still do not hear dial tone, notify the AT&T Service Center acting as the customer’s agent.

7If you cannot dial out on any of the trunks, notify the AT&T Service Center acting as the customer’s agent.

Labeling Trunks

You can have up to 80 central office line/trunk jacks on the system. This procedure describes how to label each D2R or D8W cord, network interface jack, and control unit module jack.

To label trunks, follow the steps below:

1Review System Form 2c, System Numbering: Line/Trunk Jacks to determine each central office trunk assignment on the control unit.

2Place a green cord label at each end of every D2R or D8W cord. (These labels are packaged with the basic carrier.)

The green label indicates the number of the central office line/trunk jack to which the cord is connected.

3Label the jacks on the termination blocks,

4Leave a copy of System Form 2C in a secure place near the control unit.

Installing the Channel Service Unit

The Channel Service Unit (CSU) provides the interface between the 100D module and the DS1 facilities, The system supports three basic models:

ACCULINK 3150 CSU (You may also install an ACCULINK 3160 or 3164 CSU; these provide 2- or 4-data ports, respectively.)

ESF (Extended Superframe format) T1 CSU

551 T1 CSU

4-14Connecting the Control Unit to the Network Interface