[cisco-voip] how codec transparent works?

[Ryan Huff]

The reason that is happening is due to media negotiation failure as you mention (both call legs are not offering the same codec capabilities). In that exact configuration, you would need a transcoder (which you could run on the router if you have enough DSP).

Are you sold on h323 or can you do a full SIP trunk (with MTP) between cucm and asterisk?

Thanks,

Ryan
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