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Testing Trunks
2 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 a dial tone,
notify the AT&T Service Center acting as the customer’s agent.
3 When you hear a dial tone, dial a known telephone number to verify
dialing.
After the central office completes the connection, check that you have good
two-way transmission.
4 If you cannot dial out on any of the trunks, notify the AT&T Service
Center acting as the customer’s agent.
It is the customer’s responsibility (or that of the customer’s agent) to report
service outages to the local telephone company.
Testing Ground-Start Trunks
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To perform this test, you need a single-line telephone with a ground key or a
ground-start button.
NOTE:
If a single-line telephone with a ground key or ground-start button is not
available, ground one side of the trunk.
To test ground-start trunks, follow the steps below:
Plug the single-line telephone into each central office line/trunk jack
(either at the network interface or at the cross-connect field).
Pick up the handset.
You should hear a dial tone.
Ground the ring lead by pushing the ground key or ground button, or by
grounding one side of the trunk.
Remove the ground from the ring lead.
Dial a telephone number to verify dialing.
Also, check that you have good two-way transmission after the central office
completes the connection.
Connecting the Control Unit to the Network Interface 4-13