asterisk users - Jan 2006 - WARNING: chan_sip.c:3470 process_sdp: Unknown SDP media type in offer: image 5004 udptl t38

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

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

it means that your sender is capable of sending t38, but asterisk (without at 
a minimum the t38-patches for passthrough) is not capable of handling this. 
if you have reinvite for this channel allowed and your sender can send the 
fax over g711 asterisk will send a reinvite and the fax has a chance of 
getting through.

afaik the warning is not an issue if you and your sender can reinvite to g711.

greetings from graz,

Am Freitag, 27. Januar 2006 11:48 schrieb Giorgio
Incantalupo:
> 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
> _______________________________________________
> --Bandwidth and Colocation provided by Easynews.com --
>
> Asterisk-Users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url :
http://lists.digium.com/pipermail/asterisk-users/attachments/20060127/4f8c09df/attachment.pgp