Dropping Voice Calls

Unanswered Question
Oct 19th, 2007
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Dear all,

We have voIP between two sites, connected over MPLS and voice calls drop now and then. We use Avaya for Voice boxes and Cisco routers/switches elsewhere. QoS is configured on both ends of the MPLS to prioritize voice packets and I do not see any drops in the voice packets at both the ends under "sh policy-map interface" command.

I am new to Voice and wondering where to start the troubleshooting.

Any help is appreciated.

Thank you,


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hadbou Thu, 10/25/2007 - 07:19
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Paste you Sh run and Sh ver, could you update when the call is dropped [after pickup the call, the call get dropped or in conversation the call get dropped].

If your call get dropped after pickup, it is due to codec mismatch.

Joseph W. Doherty Fri, 10/26/2007 - 18:21
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Are you providing QoS just for the voice bearer traffic or do you also provide special handling for voice control traffic?


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