Question?
Why some ipphone can not dialing tone on hook -off
Reason:
The fault may be caused by the following:
Line fault
Hardware fault
Network fault
Data configuration error
Solution:
Check whether the telephone indicator is ON, that is, whether
there is battery feed on hook-off.
When there is no battery feed, perform the following operations:
Check the subscriber line or whether the subscriber cable is
correctly connected with the telephone and the ONU. If the
connection is correct, check whether the cable is in good condition.
You can also change the telephone cable to check whether
the telephone cable is faulty
When the subscriber is down, try to dial the subscriber from
other subscribers. If the fault still exists, reset the voice
card

Helpful.....

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