IP Phone dials but stuck in silent state

Unanswered Question
Jul 3rd, 2007


Can someone explain why IP Phone failed to send digits to Call Manager. I have IP Phones which cannot place a call, but can receive a call. When user dial digits, it's stuck in silent state and no ringback tone heard.

I tried to reinsert the IP Phone to the CCM but that is useless. Anyone have the same problem ? Thanks.


I have this problem too.
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Majdi Harb Tue, 07/03/2007 - 21:39

does it keeps silent then after the interdigit is timed out (15 sec by default) u hear a busy tone?

what gateway do u have? whats ur protocol?

for pri do the show isdn status

sometimes it just needs to do reset this gateway from CCM



sr2290723 Tue, 07/03/2007 - 22:55

What I mean by silent is absolutely no tone heard, even a busy tone. It happens to all calls from the phone, not restricted to PSTN call only.


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