- Verify that the telephone
line is properly connected to both the interface card and the
switch.
- Verify that the analog
line is set up properly on the switch.
- Verify that the switch
port has a dial tone. To do so, remove the analog line, plug in
an analog telephone, and listen with the handset for dial tone.
If there is a dial
tone, the analog-line interface card is defective. If there is
no dial tone, the problem is with the switch. Verify the wiring
and administration of the switch.
If the system displays
the following message, the system did not detect a dial tone.
However, it did detect loop current, which could be a result of
excessive load on the analog-line interface card. If you see the
following message, complete Steps d and e.
Diag TR
number
:
No dial tone frequencies set
- Verify that the analog
lines are distributed over several analog-line interface cards.
- Verify that the switch
administration for the ports is valid.
If the system displays
either of the following messages, the channel or card is not working
and you must replace the analog-line interface
card:
Channel number
changed to state BROKEN
Card number
changed to state BROKEN