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

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