I didn't find that exact message in the RFC's, but I did find something similar in RFC 3407 (http://www.rfc-archive.org/getrfc.php?rfc=3407),

   a=cdsc: 4 image udptl t38

Which means that the sender is capable of sending T.38 fax over UDP.

I wouldn't worry about it unless you were trying to receive a T.38 fax over UDP, or it 
causes some other problem.  If you need to get further into this, run "sip 
debug" from the console so you can see the entire SIP message in which this line 
appears.

Giorgio Incantalupo wrote:
Hi,
I'm using asterisk 1.2.1.
Is there anybody out there who knows what this warning means?

*WARNING: chan_sip.c:3470 process_sdp: Unknown SDP media type in offer: image 5004 udptl t38*

Google does not help at all.

TIA

Giorgio Incantalupo
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