[Freeswitch-users] T.38 SDP not forwarded by FS in t38-passthru mode

[Brian West]

I'm going to guess its because SOA has rejected the image part on the first leg.  Please provide a complete SIP trace and open a jira. 

Thanks,
Brian

On Feb 9, 2012, at 5:39 AM, Stephen Wilde wrote:

> I have trouble with fax because the INVITE generated by FS doesn't contain
> the image part.
> 
> In my profile I have set:
> 
> <param name="t38-passthru" value="true" />
> 
> and the dialplan (simplified)  is:
> 
> <action application="export" data="t38_passthru=true"/>
> <action application="bridge" data="sofia/external/xxxx" />
> 
> but when is received an INVITE with SDP:
> 
> v=0
> o=- 2598299616 0 IN IP4 213.204.31.103
> s=session
> t=0 0
> m=audio 4640 RTP/AVP 18 8 96
> c=IN IP4 213.204.31.32
> a=rtpmap:18 G729/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:96 telephone-event/8000
> m=image 4642 udptl t38
> c=IN IP4 213.204.31.32
> a=T38FaxVersion:0
> a=T38MaxBitRate:14400
> a=T38FaxUdpEC:t38UDPRedundancy
> a=T38FaxRateManagement:transferredTCF
> 
> is generated in the outbound leg an SDP:
> 
>   v=0
>   o=FreeSWITCH 1328751960 1328751961 IN IP4 217.19.146.173
>   s=FreeSWITCH
>   c=IN IP4 217.19.146.173
>   t=0 0
>   m=audio 31196 RTP/AVP 18 8 0 101 13
>   a=rtpmap:101 telephone-event/8000
>   a=fmtp:101 0-16
>   a=ptime:20
> 
> without image part.
> 
> Here the log:
> 
> http://pastebin.freeswitch.org/18333
> 
> Any advice?
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-- 
Brian West 
FreeSWITCH Solutions, LLC
Phone: +1 (918) 420-9266 
Fax:   +1 (918) 420-9267
brian at freeswitch.org
http://www.freeswitch.org

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