[OpenSIPS-Users] MediaProxy 2.3.10: T38 Fax using zoiper 2.14 for MAC

Mike O'Connor mike at oeg.com.au
Thu Jan 28 12:57:45 CET 2010

Hi Saúl

Thanks, too tell you the truth I was seeing this in the asterisk logs
but was not sure what a correct trace should look like.

I'll look into the correcting some other way.


On 28/01/10 9:52 PM, Saúl Ibarra Corretgé wrote:
> Hi Mike,
> I received your trace, but let me answer you on the list, I won't expose 
> anything:)
> Here is what happens:
> - Zoiper sends an INVITE with audio proposal.
> - Asterisk answers with 200OK and audio answer (m=audio on the SDP)
> - Zoiper sends a re-INVITE to change to T.38 with a proposal (m=image on 
> SDP)
> - Asterisk answers with 200OK but m=audio on the SDP
> At this point, MediaProxy raises an exception because it detects this 
> mismatch. AFAIK Asterisk should reply with m=image so that the T.38 flow 
> gets correctly established.
> I'm not a faxing expert myself, but that's what code and traces show me...
> Regards,

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