Our product, which sits kind of on top of sipX, generates calls, redirects calls etc.
This issue is for sipX 4.0.4 using sipXBridge and the fault is seen on several different ITSPs In this scenario we have an external call redirected out to an other external party. We then want to add a party, so the two original call legs are moved into a conference bridge and the third leg (external) is added. This is where the problem starts. This last INVITE goes out and RTP starts coming in immediately. This RTP stream gets buffered in sipX (sipXBridge?) until the 180 Ringing arrives. Then sipXBridge starts sending the buffered RTP into the conference where it is sent out with no delay. The ring tone coming as result of 180 is delayed until all the buffered packets are sent to the conference bridge. Then the voice is delayed when the ring tone packets are finished (after 200 OK). This is from WireShark, the RTP packet comes in from SIP trunk (123.102.11.15) and is relayed to conf bridge 3 seconds later. 8650 38.547256 123.102.11.15 40036 192.168.0.10 30508 RTP PT=ITU-T G.711 PCMA, SSRC=0x8D56FB95, Seq=35378, Time=200 10722 41.856764 192.168.0.10 30510 192.168.0.10 12536 RTP PT=ITU-T G.711 PCMA, SSRC=0x8D56FB95, Seq=35378, Time=200 So my question is : Why does RTP get buffered in sipX? And sorry, I do not know whether to send pcaps or snapshots... Regards, Sven Sven Evensen, Technical Support Consultant OnRelay Elizabeth House | 39 York Road, London SE1 7NQ, UK | +44 (0) 207 902 8123 | [email protected] | <http://www.onrelay.com/> www.onrelay.com <http://www.onrelay.com/> This electronic message transmission contains information from OnRelay, Ltd., that may be confidential or privileged. The information is intended solely for the recipient and use by any other party is not authorised. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information or any attachment, is prohibited. If you have received this electronic transmission in error, please notify us immediately by electronic mail ([email protected]) and delete this message, along with any attachments, from your computer. Registered in England No 04006093 | Registered Office 1st Floor, 236 Gray's Inn Road, London WC1X 8HL
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