Call Disconnects after one ring

Unanswered Question
Sep 2nd, 2008
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Hi,


Call manager V4.1(3) with 2821 MGCP gateways. Inbound calls from 30 Channel BT bearer fail intermittently. The internal IPT handset rings once and the call disconnects.


BT say that there are no issues with the circuit?.


No issues are experienced with outbound calls.


No IP routing problems are apparent between gateway and Call manager etc.


Any ideas on how best to troubleshoot would be appreciated.


thanks


Ian.

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shabali52 Tue, 09/02/2008 - 05:42
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Does it allow your to pickup the call via handset or it disconnects even before that, sounds like a codec issue.

iwearing Tue, 09/02/2008 - 06:08
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The call is never answered. It disconnects after one ring. It is intermittent though.


Ian.

Chris Deren Tue, 09/02/2008 - 06:16
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can you post a debug of the call?


Chris

iwearing Tue, 09/02/2008 - 07:29
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Chris,


Not an easy one to catch as it is intermittent.


Are you suggesting a Debug ISN Q931 from the VGateway or a Call manager trace?.


thanks


Ian.

Chris Deren Tue, 09/02/2008 - 07:32
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debug isdn q931 will give us disconnect cuase id.


Chris

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