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Labeling Trunks
6 If 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.
7 If you cannot dial out on any of the trunks, notify the AT&T Service
Center acting as the customer’s agent.
Labeling Trunks
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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:
Review System Form 2c, System Numbering: Line/Trunk Jacks to
determine each central office trunk assignment on the control unit.
Place 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.
Label the jacks on the termination blocks,
Leave a copy of System Form 2
C
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
4-14 Connecting the Control Unit to the Network Interface