<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On May 24, 2019, at 8:54 AM, Callum Guy <<a href="mailto:callum.guy@x-on.co.uk" class="">callum.guy@x-on.co.uk</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi All,<div class=""><br class=""></div><div class="">In short I have an established bridged call out to a 3rd party SIP IVR - this IVR appears to be performing 3pcc meaning I am receiving RE-INVITEs w/o SDP as the call plays prompts, goes to queue and when it is answered. For each INVITE FreeSWITCH responds with 200 with SDP and we get an ACK back with SDP. During the queue phase the ACK SDP contains a=sendonly - all previous SDP have implied sendrecv on both sides. All is OK at this stage. When the call is finally answered we get an INVITE w/o SDP and FreeSWITCH responds with SDP including a=sendonly, to which the remote replies a=sendrecv. Hence we get one way audio at the time when the conversation should be starting.</div><div class=""><br class=""></div><div class="">Can anyone help explain why FreeSWITCH would be switching to sendonly mode? I have enable_3pcc=true configured but otherwise this is a fairly standard/vanilla configuration. The behaviour I would expect is for FreeSWITCH to continue to omit the attribute and imply sendrecv. </div><div class=""><br class=""></div></div></div></blockquote><div><br class=""></div><div>"During the queue phase the ACK SDP contains a=sendonly”</div><div><br class=""></div><div>Freeswitch is NOT switching it.. the other side is.</div><div><br class=""></div><div><br class=""></div><blockquote type="cite" class=""><div class=""><div dir="ltr" class=""><div class="">Are there specific variables which might allow me to manage the SDP attributes?</div><div class=""><br class=""></div><div class="">Please find a trace log attached. </div><div class=""><br class=""></div><div class="">Platform:</div><div class="">FreeSWITCH Version 1.8.5-6-31281a0bf1~64bit (-6-31281a0bf1 64bit)<br class=""></div><div class="">Linux my.network 4.9.0-8-amd64 #1 SMP Debian 4.9.144-3.1 (2019-02-19) x86_64 GNU/Linux<br class=""></div><div class=""><br class=""></div><div class="">Let me know if I can offer any more details regarding the implementation, thanks,</div><div class=""><br class=""></div><div class="">Callum</div><div class=""><br class=""></div></div>
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