<div dir="ltr"><div>Hey Andy,</div><div><br></div><div>not interested in the consulting myself, but as I have a small bit of using freeswitch as an sbc in the past, did you try to enable the option on your call to rewrite the rtp-timestamps? This may fix the first issue, depending on the exact sip-scenario.</div><div><br></div><div>
<span class="gmail-st"> <param name="<em>rtp</em>-<em>rewrite</em>-<em>timestamps</em>" value="true"/> ...</span> <br></div><div><br></div><div>You can do a lot with transfers in freeswitch. If it's a refer, you'll have to implement the refer-dialplan-part, but it has been a while and maybe I'm out-of-date :).<br></div><div><br></div><div>Just a quick idea that help you along maybe.<br></div><div><br></div><div>Kind regards,</div><div><br></div><div>Michem<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jun 29, 2020 at 8:44 PM Andy Newlands <<a href="mailto:andynewlands@gmail.com">andynewlands@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">We are using Freeswitch as the core of our UK-based SIP platform, which connects with main carriers in the UK, and have a couple of issues which we have been unable to properly resolve ourselves. We are now seeking a Freeswitch expert who can assist in achieving resolution, on a consultancy/contract basis.<div><br></div><div>Where is the most appropriate place to find suitably qualified experts, with proven track-records and endorsements?</div><div><br></div><div>Layout is basically PSTN_CARRIER<->FS<-->CUSTOMER_PBX</div><div>(there are also proxies and FS-based SBCs (Kamailio))</div><div><br></div><div>At high-level, the issues are:</div><div><br></div><div><ul><li>Loss of RTP when a call is transferred or diverted by the CUSTOMER_PBX</li><li>Attempting to transfer a call from the CUSTOMER_PBX can result in ringback continuing, after the transfer-to endpoint answers (again, no RTP).</li><li>Behaviour varies depending on which PSTN_CARRIER calls are routed through (we have multiple interconnects)</li><li>We can see nothing obviously wrong in the call traces.</li></ul></div><div><div><div><div dir="ltr"><div dir="ltr"><div>Thank you</div><div><br></div>Kind regards,<div><br></div><div>Andy</div></div></div></div></div></div></div>
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