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</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi All<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am having trouble on a new FreeSWITCH-based SBC we’ve built. We are going through some SBCs and upgrading them. In this case, we are upgrading an old SBC running: 1.4.15 64bit built from source.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The new version is running on Debian 8.3 (AMD64) Stable with the packaged version of FreeSWITCH: 1.6.14 -23-e460bf8 64bit<o:p></o:p></p><p class=MsoNormal>We are tying this in with a hardware swap, so the 1.6.14-23 box is new.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We have a few instances where our upstream carrier presents us with a SDP which contains:<o:p></o:p></p><p class=MsoNormal>m=image 56594 udptl t38<o:p></o:p></p><p class=MsoNormal>a=T38FaxUdpEC:t38UDPRedundancy<o:p></o:p></p><p class=MsoNormal>a=T38FaxRateManagement:transferredTCF<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Historically (version 1.4.15) these seem to be ignored and FreeSWITCH passes the call out obeying the absolute_codec_string set during bridge. Transcoding is allowed and when negotiating a codec with the carrier, these parameters were ignored and G.711a was usually negotiated on both legs.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On the new platform, FreeSWITCH seems to be attempting to parse these and negotiate T.38. I am certain that it is something silly that I’m doing wrong, but can’t find it and would welcome others’ thoughts. What have I missed? Has anyone seen this before? I have tried t38_passthru=true to no avail.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I can’t set proxy_media=true or bypass_media=true as we need FreeSWITCH to shield other devices from the SDP parameters above.<o:p></o:p></p><p class=MsoNormal>Most of the configuration is stored in a database and returned to FreeSWITCH using mod_xml_curl. I have pasted some configuration excerpts, SIP messages and logs in: <a href="https://pastebin.freeswitch.org/view/de059ffc">https://pastebin.freeswitch.org/view/de059ffc</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Please let me know if there is any other information you need from me.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Many thanks in advance for your assistance.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Tristan<o:p></o:p></p></div>
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