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Connecting the Control Unit to the Network Interface
Test Ground-Stat Trunks
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 a trunk.
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Plug the single-line telephone into each central office 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 button) or by
grounding one side of the trunk.
Remove the ground from the ring lead.
Dial a known telephone number to verify dialing.
Also, check that you have good two-way transmission after the central
office completes the connection.
If you find a central office trunk that does not have a dial tone, check
for a bad adapter or loose connections.
If adapters and wiring are in working order but you still don’t hear a dial
tone, notify the customer.
If outward dialing is not possible on any of the trunks, notify the
customer.
NOTE:
It is the customer’s responsibility to report service outages to the
local telephone company.
Testing Trunks
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