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New Member

H323 to SIP bridging Codec negotiation problem

We have an AS5400HPX bridging calls between H323 and SIP successfully using either g729 or g711, but not both.

Calls come in H323, either using g729 or g711, and then should go out SIP using the same incoming codecs.

The SIP proxy we are using supports both g729 and g711.

For some reason, we cannot get the AS5400 to use both codecs when making SIP calls. The AS5400 negotiates the codecs with the SIP server independently of what the incoming H323 uses. If the AS5400 negotiates g729 with the SIP server, then incoming g711 h323 calls do not work, and vice-a-versa.

If anyone has any ideas how to get this to work, including transcoding on the AS5400 I would very much appreciate some direction.

Regards,

Joe

2 REPLIES
Bronze

Re: H323 to SIP bridging Codec negotiation problem

Ensure that there is line code violation under the controller. This URL should also help you:

http://www.cisco.com/warp/public/788/voip/faxrelay_tsguide.html

New Member

Re: H323 to SIP bridging Codec negotiation problem

The above link does not seem relative since there is no E1 controller involved. This is strictly an H323 to SIP call, ethernet on both sides of the router, one side h323 g729, and the other side SIP g711.

Thanks for your help.

Joe

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