FreeSWITCH – Incompatible Destination

Back to basics today - A recent adventure working with FreeSWITCH and Codecs incompatibility.

A quick look at a possible cause for “INCOMPATIBLE DESTINATION” errors in FreeSWITCH.

Without knowing much about FreeSWITCH, then your log output strongly suggests that you have a codec mismatch between the two parties.

It looks like one side supports GSM-FR and the other side supports Opus/G722/G711ulaw/G711alaw. You will need transcoding to make that call go through.

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