PRACK/rel100 - Printable Version +- Yealink Forums (http://forum.yealink.com/forum) +-- Forum: IP Phone Series (/forumdisplay.php?fid=4) +--- Forum: General topics (/forumdisplay.php?fid=15) +--- Thread: PRACK/rel100 (/showthread.php?tid=2427) |
PRACK/rel100 - looserouting - 09-18-2014 10:28 PM I had some problem with my phone T26P. it send PRACK retransmission even if it received a 200 OK response.(dunno if its a bug or it's caused by packet lost) depending on the sip server this causes the server to send a 606 Not acceptable an the call was drop. So i decided to turn off PRACK in the config menu. I found the option "Retransmission" in Account-->Advanced. The describtions says "Enable/Disable PRACK transmission". But regardless of the choice i made the phone always sends "Supported: rel100". A SIP server could answer with "Require:rel100" in the response. So if deactivating PRACK the phone shouldn't send "Supported: rel100" i am running 6.73.0.15 but it also happend with 6.72.0.79. RE: PRACK/rel100 - James_Yealink - 09-19-2014 11:25 AM Hi Looserouting, For an analysis, can you please send pcap file, level 6 syslog, config.bin file to us. http://forum.yealink.com/forum/showthread.php?tid=1319 Regards, james RE: PRACK/rel100 - looserouting - 09-23-2014 05:50 PM this is really simple to reproduce. just disable PRACK as I discribed and make a call. You will see in the header "Supported: rel100". But that's not what you would expect. As I said before: the remote party could answer with "Required: rel100". So when PRACK is disabled "Supported: rel100" should be omitted. RE: PRACK/rel100 - looserouting - 11-03-2014 04:09 AM I don't have a yealink phone anymore. So I can't help with that. Sorry |