Hi, We are capturing packets for call quality monitoring purposes, and as part of the capture, we are grabbing the outbound packets from FreeSwitch. We are noticing what appears to be an odd behaviour in the RTP sequence timing where suddenly the timing will jump from the regular 160 increments to a number in the 10's of millions! See packet 38 below. Now I have no idea as to whether such a timing change is OK in RTP, and although the actual RTP stream does not appear to be affected, I do see that Wireshark believes there is a massive amount of jitter on the line when it analyses the packets, and any RTCP Sender Reports from the target device (and indeed several different target types have been tried) also report very large inter arrival jitter numbers at this point! It's the RTCP side of things that are more of interest here, as trying to get accurate results of our downstream jitter by capturing the returned RTCP packets. I believe that all the times we see this, there is however a Marker bit present! So I guess the question is whether this is expected behaviour, and if not any ideas? No. Time Source Destination Protocol Info 1 0.000000 gmtpbx02.redmatter.com sil1.magrathea.net SIP/SDP Request: INVITE sip:441277849884@sipipgw.magrathea.net, with session description 2 0.001595 sil1.magrathea.net gmtpbx02.redmatter.com SIP Status: 100 Giving a try 3 1.103160 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=0, Time=0 4 1.124816 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=1, Time=160 5 1.142758 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=2, Time=320 6 1.163702 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=3, Time=480 7 1.184239 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=4, Time=640 8 1.203259 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=5, Time=800 9 1.223456 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=6, Time=960 10 1.243953 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=7, Time=1120 11 1.264504 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=8, Time=1280 12 1.284839 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=9, Time=1440 13 1.304590 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=10, Time=1600 14 1.323589 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=11, Time=1760 15 1.344672 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=12, Time=1920 16 1.359227 sil1.magrathea.net gmtpbx02.redmatter.com SIP/SDP Status: 183 Session Progress, with session description 17 1.364522 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=13, Time=2080 18 1.377484 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53974, Time=160, Mark 19 1.383466 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=14, Time=2240 20 1.397476 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53975, Time=320 21 1.403953 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=15, Time=2400 22 1.417484 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53976, Time=480 23 1.423616 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=16, Time=2560 24 1.437474 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53977, Time=640 25 1.444930 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=17, Time=2720 26 1.457475 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53978, Time=800 27 1.463341 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=18, Time=2880 28 1.477473 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53979, Time=960 29 1.484235 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=19, Time=3040 30 1.497483 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53980, Time=1120 31 1.503415 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=20, Time=3200 32 1.517474 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53981, Time=1280 33 1.523541 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=21, Time=3360 34 1.537472 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53982, Time=1440 35 1.543428 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=22, Time=3520 36 1.557567 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53983, Time=1600 37 1.563656 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=23, Time=3680 38 1.577496 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53984, Time=130238272, Mark 39 1.584747 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=24, Time=3840 40 1.597474 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53985, Time=130238432 41 1.603871 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=25, Time=4000 42 1.617465 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53986, Time=130238432 43 1.624224 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=26, Time=4160 44 1.637466 gmtpbx02.redmatter.com lon-avon-four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53987, Time=130238592 Many thanks, Neil
Neil, as far as I know, by default, FS is transparent for timestamps. It writes in outbound RTP the exact timestamp that it received in inbound RTP. So you should perhaps have a look at the sending endpoint ? David Ponzone Direction Technique email: david.ponzone@ipeva.fr tel: 01 74 03 18 97 gsm: 06 66 98 76 34 Service Client IPeva tel: 0811 46 26 26 www.ipeva.fr - www.ipeva-studio.com Ce message et toutes les pièces jointes sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute utilisation ou diffusion non autorisée est interdite. Tout message électronique est susceptible d'altération. IPeva décline toute responsabilité au titre de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce message, merci de le détruire immédiatement et d'avertir l'expéditeur. Le 21/07/2010 à 16:36, Neil Burgess a écrit :
Hi,
We are capturing packets for call quality monitoring purposes, and as part of the capture, we are grabbing the outbound packets from FreeSwitch. We are noticing what appears to be an odd behaviour in the RTP sequence timing where suddenly the timing will jump from the regular 160 increments to a number in the 10’s of millions! See packet 38 below. Now I have no idea as to whether such a timing change is OK in RTP, and although the actual RTP stream does not appear to be affected, I do see that Wireshark believes there is a massive amount of jitter on the line when it analyses the packets, and any RTCP Sender Reports from the target device (and indeed several different target types have been tried) also report very large inter arrival jitter numbers at this point! It’s the RTCP side of things that are more of interest here, as trying to get accurate results of our downstream jitter by capturing the returned RTCP packets. I believe that all the times we see this, there is however a Marker bit present!
So I guess the question is whether this is expected behaviour, and if not any ideas?
No. Time Source Destination Protocol Info 1 0.000000 gmtpbx02.redmatter.com sil1.magrathea.net SIP/ SDP Request: INVITEsip:441277849884@sipipgw.magrathea.net, with session description 2 0.001595 sil1.magrathea.net gmtpbx02.redmatter.com SIP Status: 100 Giving a try 3 1.103160 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=0, Time=0 4 1.124816 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=1, Time=160 5 1.142758 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=2, Time=320 6 1.163702 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=3, Time=480 7 1.184239 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=4, Time=640 8 1.203259 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=5, Time=800 9 1.223456 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=6, Time=960 10 1.243953 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=7, Time=1120 11 1.264504 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=8, Time=1280 12 1.284839 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=9, Time=1440 13 1.304590 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=10, Time=1600 14 1.323589 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=11, Time=1760 15 1.344672 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=12, Time=1920 16 1.359227 sil1.magrathea.net gmtpbx02.redmatter.com SIP/ SDP Status: 183 Session Progress, with session description 17 1.364522 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=13, Time=2080 18 1.377484 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53974, Time=160, Mark 19 1.383466 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=14, Time=2240 20 1.397476 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53975, Time=320 21 1.403953 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=15, Time=2400 22 1.417484 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53976, Time=480 23 1.423616 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=16, Time=2560 24 1.437474 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53977, Time=640 25 1.444930 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=17, Time=2720 26 1.457475 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53978, Time=800 27 1.463341 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=18, Time=2880 28 1.477473 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53979, Time=960 29 1.484235 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=19, Time=3040 30 1.497483 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53980, Time=1120 31 1.503415 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=20, Time=3200 32 1.517474 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53981, Time=1280 33 1.523541 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=21, Time=3360 34 1.537472 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53982, Time=1440 35 1.543428 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=22, Time=3520 36 1.557567 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53983, Time=1600 37 1.563656 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=23, Time=3680 38 1.577496 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53984, Time=130238272, Mark 39 1.584747 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=24, Time=3840 40 1.597474 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53985, Time=130238432 41 1.603871 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=25, Time=4000 42 1.617465 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53986, Time=130238432 43 1.624224 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=26, Time=4160 44 1.637466 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53987, Time=130238592
Many thanks, Neil _______________________________________________ FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
That's not quite true - if it depends on the value in the sip profile of: <param name="rtp-rewrite-timestamps" value="true"/> Sonus is known to have timestamp problems. Is there a Sonus gateway anywhere in the media path? -Steve On 21 July 2010 15:51, David Ponzone <david.ponzone@gmail.com> wrote:
Neil,
as far as I know, by default, FS is transparent for timestamps. It writes in outbound RTP the exact timestamp that it received in inbound RTP. So you should perhaps have a look at the sending endpoint ?
David Ponzone Direction Technique email: david.ponzone@ipeva.fr tel: 01 74 03 18 97 gsm: 06 66 98 76 34
Service Client IPeva tel: 0811 46 26 26 www.ipeva.fr - www.ipeva-studio.com
*Ce message et toutes les pièces jointes sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute utilisation ou diffusion non autorisée est interdite. Tout message électronique est susceptible d'altération. **IPeva** décline toute responsabilité au titre de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce message, merci de le détruire immédiatement et d'avertir l'expéditeur.* * *
Le 21/07/2010 à 16:36, Neil Burgess a écrit :
Hi,
We are capturing packets for call quality monitoring purposes, and as part of the capture, we are grabbing the outbound packets from FreeSwitch. We are noticing what appears to be an odd behaviour in the RTP sequence timing where suddenly the timing will jump from the regular 160 increments to a number in the 10’s of millions! See packet 38 below. Now I have no idea as to whether such a timing change is OK in RTP, and although the actual RTP stream does not appear to be affected, I do see that Wireshark believes there is a massive amount of jitter on the line when it analyses the packets, and any RTCP Sender Reports from the target device (and indeed several different target types have been tried) also report very large inter arrival jitter numbers at this point! It’s the RTCP side of things that are more of interest here, as trying to get accurate results of our downstream jitter by capturing the returned RTCP packets. I believe that all the times we see this, there is however a Marker bit present!
So I guess the question is whether this is expected behaviour, and if not any ideas?
No. Time Source Destination Protocol Info 1 0.000000 gmtpbx02.redmatter.com sil1.magrathea.net SIP/SDP Request: INVITEsip:441277849884@sipipgw.magrathea.net, with session description 2 0.001595 sil1.magrathea.net gmtpbx02.redmatter.com SIP Status: 100 Giving a try 3 1.103160 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=0, Time=0 4 1.124816 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=1, Time=160 5 1.142758 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=2, Time=320 6 1.163702 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=3, Time=480 7 1.184239 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=4, Time=640 8 1.203259 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=5, Time=800 9 1.223456 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=6, Time=960 10 1.243953 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=7, Time=1120 11 1.264504 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=8, Time=1280 12 1.284839 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=9, Time=1440 13 1.304590 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=10, Time=1600 14 1.323589 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=11, Time=1760 15 1.344672 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=12, Time=1920 16 1.359227 sil1.magrathea.net gmtpbx02.redmatter.com SIP/SDP Status: 183 Session Progress, with session description 17 1.364522 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=13, Time=2080 18 1.377484 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53974, Time=160, Mark 19 1.383466 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=14, Time=2240 20 1.397476 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53975, Time=320 21 1.403953 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=15, Time=2400 22 1.417484 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53976, Time=480 23 1.423616 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=16, Time=2560 24 1.437474 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53977, Time=640 25 1.444930 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=17, Time=2720 26 1.457475 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53978, Time=800 27 1.463341 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=18, Time=2880 28 1.477473 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53979, Time=960 29 1.484235 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=19, Time=3040 30 1.497483 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53980, Time=1120 31 1.503415 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=20, Time=3200 32 1.517474 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53981, Time=1280 33 1.523541 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=21, Time=3360 34 1.537472 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53982, Time=1440 35 1.543428 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=22, Time=3520 36 1.557567 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53983, Time=1600 37 1.563656 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=23, Time=3680 38 1.577496 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53984, Time=130238272, Mark 39 1.584747 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=24, Time=3840 40 1.597474 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53985, Time=130238432 41 1.603871 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=25, Time=4000 42 1.617465 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53986, Time=130238432 43 1.624224 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=26, Time=4160 44 1.637466 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53987, Time=130238592
Many thanks, Neil _______________________________________________ FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
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for the record its ok to skip forward in timestamps as long as the mark bit is set... /b On Jul 21, 2010, at 10:44 AM, Steven Ayre wrote:
That's not quite true - if it depends on the value in the sip profile of: <param name="rtp-rewrite-timestamps" value="true"/>
Sonus is known to have timestamp problems. Is there a Sonus gateway anywhere in the media path?
-Steve
Steven, sure, and in the default config, rtp-rewrite-timestamps is commented out and false by default. David Ponzone Direction Technique email: david.ponzone@ipeva.fr tel: 01 74 03 18 97 gsm: 06 66 98 76 34 Service Client IPeva tel: 0811 46 26 26 www.ipeva.fr - www.ipeva-studio.com Ce message et toutes les pièces jointes sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute utilisation ou diffusion non autorisée est interdite. Tout message électronique est susceptible d'altération. IPeva décline toute responsabilité au titre de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce message, merci de le détruire immédiatement et d'avertir l'expéditeur. Le 21/07/2010 à 17:44, Steven Ayre a écrit :
That's not quite true - if it depends on the value in the sip profile of: <param name="rtp-rewrite-timestamps" value="true"/>
Sonus is known to have timestamp problems. Is there a Sonus gateway anywhere in the media path?
-Steve
On 21 July 2010 15:51, David Ponzone <david.ponzone@gmail.com> wrote: Neil,
as far as I know, by default, FS is transparent for timestamps. It writes in outbound RTP the exact timestamp that it received in inbound RTP. So you should perhaps have a look at the sending endpoint ?
David Ponzone Direction Technique email: david.ponzone@ipeva.fr tel: 01 74 03 18 97 gsm: 06 66 98 76 34
Service Client IPeva tel: 0811 46 26 26 www.ipeva.fr - www.ipeva-studio.com
Ce message et toutes les pièces jointes sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute utilisation ou diffusion non autorisée est interdite. Tout message électronique est susceptible d'altération. IPeva décline toute responsabilité au titre de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce message, merci de le détruire immédiatement et d'avertir l'expéditeur.
Le 21/07/2010 à 16:36, Neil Burgess a écrit :
Hi,
We are capturing packets for call quality monitoring purposes, and as part of the capture, we are grabbing the outbound packets from FreeSwitch. We are noticing what appears to be an odd behaviour in the RTP sequence timing where suddenly the timing will jump from the regular 160 increments to a number in the 10’s of millions! See packet 38 below. Now I have no idea as to whether such a timing change is OK in RTP, and although the actual RTP stream does not appear to be affected, I do see that Wireshark believes there is a massive amount of jitter on the line when it analyses the packets, and any RTCP Sender Reports from the target device (and indeed several different target types have been tried) also report very large inter arrival jitter numbers at this point! It’s the RTCP side of things that are more of interest here, as trying to get accurate results of our downstream jitter by capturing the returned RTCP packets. I believe that all the times we see this, there is however a Marker bit present!
So I guess the question is whether this is expected behaviour, and if not any ideas?
No. Time Source Destination Protocol Info 1 0.000000 gmtpbx02.redmatter.com sil1.magrathea.net SIP/SDP Request: INVITEsip:441277849884@sipipgw.magrathea.net, with session description 2 0.001595 sil1.magrathea.net gmtpbx02.redmatter.com SIP Status: 100 Giving a try 3 1.103160 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=0, Time=0 4 1.124816 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=1, Time=160 5 1.142758 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=2, Time=320 6 1.163702 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=3, Time=480 7 1.184239 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=4, Time=640 8 1.203259 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=5, Time=800 9 1.223456 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=6, Time=960 10 1.243953 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=7, Time=1120 11 1.264504 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=8, Time=1280 12 1.284839 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=9, Time=1440 13 1.304590 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=10, Time=1600 14 1.323589 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=11, Time=1760 15 1.344672 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=12, Time=1920 16 1.359227 sil1.magrathea.net gmtpbx02.redmatter.com SIP/SDP Status: 183 Session Progress, with session description 17 1.364522 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=13, Time=2080 18 1.377484 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53974, Time=160, Mark 19 1.383466 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=14, Time=2240 20 1.397476 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53975, Time=320 21 1.403953 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=15, Time=2400 22 1.417484 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53976, Time=480 23 1.423616 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=16, Time=2560 24 1.437474 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53977, Time=640 25 1.444930 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=17, Time=2720 26 1.457475 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53978, Time=800 27 1.463341 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=18, Time=2880 28 1.477473 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53979, Time=960 29 1.484235 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=19, Time=3040 30 1.497483 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53980, Time=1120 31 1.503415 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=20, Time=3200 32 1.517474 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53981, Time=1280 33 1.523541 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=21, Time=3360 34 1.537472 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53982, Time=1440 35 1.543428 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=22, Time=3520 36 1.557567 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53983, Time=1600 37 1.563656 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=23, Time=3680 38 1.577496 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53984, Time=130238272, Mark 39 1.584747 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=24, Time=3840 40 1.597474 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53985, Time=130238432 41 1.603871 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=25, Time=4000 42 1.617465 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53986, Time=130238432 43 1.624224 lon-avon-four.magrathea.net gmtpbx02.redmatter.com RTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=26, Time=4160 44 1.637466 gmtpbx02.redmatter.com lon-avon- four.magrathea.net RTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53987, Time=130238592
Many thanks, Neil _______________________________________________ FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
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I know, but it's worth checking in case he isn't on the default config. ;) On 21 July 2010 16:54, David Ponzone <david.ponzone@gmail.com> wrote:
Steven,
sure, and in the default config, rtp-rewrite-timestamps is commented out and false by default.
David Ponzone Direction Technique email: david.ponzone@ipeva.fr tel: 01 74 03 18 97 gsm: 06 66 98 76 34
Service Client IPeva tel: 0811 46 26 26 www.ipeva.fr - www.ipeva-studio.com
*Ce message et toutes les pièces jointes sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute utilisation ou diffusion non autorisée est interdite. Tout message électronique est susceptible d'altération. **IPeva** décline toute responsabilité au titre de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce message, merci de le détruire immédiatement et d'avertir l'expéditeur.* * *
Le 21/07/2010 à 17:44, Steven Ayre a écrit :
That's not quite true - if it depends on the value in the sip profile of: <param name="rtp-rewrite-timestamps" value="true"/>
Sonus is known to have timestamp problems. Is there a Sonus gateway anywhere in the media path?
-Steve
On 21 July 2010 15:51, David Ponzone <david.ponzone@gmail.com> wrote:
Neil,
as far as I know, by default, FS is transparent for timestamps. It writes in outbound RTP the exact timestamp that it received in inbound RTP. So you should perhaps have a look at the sending endpoint ?
David Ponzone Direction Technique email: david.ponzone@ipeva.fr tel: 01 74 03 18 97 gsm: 06 66 98 76 34
Service Client IPeva tel: 0811 46 26 26 www.ipeva.fr - www.ipeva-studio.com
*Ce message et toutes les pièces jointes sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute utilisation ou diffusion non autorisée est interdite. Tout message électronique est susceptible d'altération. **IPeva** décline toute responsabilité au titre de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce message, merci de le détruire immédiatement et d'avertir l'expéditeur.* * *
Le 21/07/2010 à 16:36, Neil Burgess a écrit :
Hi,
We are capturing packets for call quality monitoring purposes, and as part of the capture, we are grabbing the outbound packets from FreeSwitch. We are noticing what appears to be an odd behaviour in the RTP sequence timing where suddenly the timing will jump from the regular 160 increments to a number in the 10’s of millions! See packet 38 below. Now I have no idea as to whether such a timing change is OK in RTP, and although the actual RTP stream does not appear to be affected, I do see that Wireshark believes there is a massive amount of jitter on the line when it analyses the packets, and any RTCP Sender Reports from the target device (and indeed several different target types have been tried) also report very large inter arrival jitter numbers at this point! It’s the RTCP side of things that are more of interest here, as trying to get accurate results of our downstream jitter by capturing the returned RTCP packets. I believe that all the times we see this, there is however a Marker bit present!
So I guess the question is whether this is expected behaviour, and if not any ideas?
No. Time Source Destination Protocol Info 1 0.000000 gmtpbx02.redmatter.com sil1.magrathea.net SIP/SDP Request: INVITEsip:441277849884@sipipgw.magrathea.net, with session description 2 0.001595 sil1.magrathea.net gmtpbx02.redmatter.com SIP Status: 100 Giving a try 3 1.103160 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=0, Time=0 4 1.124816 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=1, Time=160 5 1.142758 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=2, Time=320 6 1.163702 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=3, Time=480 7 1.184239 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=4, Time=640 8 1.203259 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=5, Time=800 9 1.223456 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=6, Time=960 10 1.243953 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=7, Time=1120 11 1.264504 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=8, Time=1280 12 1.284839 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=9, Time=1440 13 1.304590 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=10, Time=1600 14 1.323589 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=11, Time=1760 15 1.344672 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=12, Time=1920 16 1.359227 sil1.magrathea.net gmtpbx02.redmatter.com SIP/SDP Status: 183 Session Progress, with session description 17 1.364522 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=13, Time=2080 18 1.377484 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53974, Time=160, Mark 19 1.383466 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=14, Time=2240 20 1.397476 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53975, Time=320 21 1.403953 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=15, Time=2400 22 1.417484 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53976, Time=480 23 1.423616 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=16, Time=2560 24 1.437474 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53977, Time=640 25 1.444930 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=17, Time=2720 26 1.457475 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53978, Time=800 27 1.463341 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=18, Time=2880 28 1.477473 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53979, Time=960 29 1.484235 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=19, Time=3040 30 1.497483 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53980, Time=1120 31 1.503415 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=20, Time=3200 32 1.517474 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53981, Time=1280 33 1.523541 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=21, Time=3360 34 1.537472 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53982, Time=1440 35 1.543428 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=22, Time=3520 36 1.557567 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53983, Time=1600 37 1.563656 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=23, Time=3680 38 1.577496 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53984, Time=130238272, Mark 39 1.584747 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=24, Time=3840 40 1.597474 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53985, Time=130238432 41 1.603871 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=25, Time=4000 42 1.617465 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53986, Time=130238432 43 1.624224 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=26, Time=4160 44 1.637466 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53987, Time=130238592
Many thanks, Neil _______________________________________________ FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
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This can be caused buy answering an inbound call, playing something in early media such as artificial ringback then bridging to another endpoint. While it's ringing, FS is generating timestamps, once it's bridged we pass through the timestamps from the far end to allow jitter to remain visible and preserve the far end timestamps. As pointed out above, there is a parameter to force the timestamps to a new value which is a bad idea if you can help it because then you lock any jitter into place by putting correctly sequenced timestamps on it. Some sonus switches reset their DSP when they see the timestamps change and the mark bit set which causes a pause in the audio. On Wed, Jul 21, 2010 at 11:52 AM, Steven Ayre <steveayre@gmail.com> wrote:
I know, but it's worth checking in case he isn't on the default config. ;)
On 21 July 2010 16:54, David Ponzone <david.ponzone@gmail.com> wrote:
Steven,
sure, and in the default config, rtp-rewrite-timestamps is commented out and false by default.
David Ponzone Direction Technique email: david.ponzone@ipeva.fr tel: 01 74 03 18 97 gsm: 06 66 98 76 34
Service Client IPeva tel: 0811 46 26 26 www.ipeva.fr - www.ipeva-studio.com
*Ce message et toutes les pièces jointes sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute utilisation ou diffusion non autorisée est interdite. Tout message électronique est susceptible d'altération. **IPeva** décline toute responsabilité au titre de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce message, merci de le détruire immédiatement et d'avertir l'expéditeur.* * *
Le 21/07/2010 à 17:44, Steven Ayre a écrit :
That's not quite true - if it depends on the value in the sip profile of: <param name="rtp-rewrite-timestamps" value="true"/>
Sonus is known to have timestamp problems. Is there a Sonus gateway anywhere in the media path?
-Steve
On 21 July 2010 15:51, David Ponzone <david.ponzone@gmail.com> wrote:
Neil,
as far as I know, by default, FS is transparent for timestamps. It writes in outbound RTP the exact timestamp that it received in inbound RTP. So you should perhaps have a look at the sending endpoint ?
David Ponzone Direction Technique email: david.ponzone@ipeva.fr tel: 01 74 03 18 97 gsm: 06 66 98 76 34
Service Client IPeva tel: 0811 46 26 26 www.ipeva.fr - www.ipeva-studio.com
*Ce message et toutes les pièces jointes sont confidentiels et établis à l'intention exclusive de ses destinataires. Toute utilisation ou diffusion non autorisée est interdite. Tout message électronique est susceptible d'altération. **IPeva** décline toute responsabilité au titre de ce message s'il a été altéré, déformé ou falsifié. Si vous n'êtes pas destinataire de ce message, merci de le détruire immédiatement et d'avertir l'expéditeur.* * *
Le 21/07/2010 à 16:36, Neil Burgess a écrit :
Hi,
We are capturing packets for call quality monitoring purposes, and as part of the capture, we are grabbing the outbound packets from FreeSwitch. We are noticing what appears to be an odd behaviour in the RTP sequence timing where suddenly the timing will jump from the regular 160 increments to a number in the 10’s of millions! See packet 38 below. Now I have no idea as to whether such a timing change is OK in RTP, and although the actual RTP stream does not appear to be affected, I do see that Wireshark believes there is a massive amount of jitter on the line when it analyses the packets, and any RTCP Sender Reports from the target device (and indeed several different target types have been tried) also report very large inter arrival jitter numbers at this point! It’s the RTCP side of things that are more of interest here, as trying to get accurate results of our downstream jitter by capturing the returned RTCP packets. I believe that all the times we see this, there is however a Marker bit present!
So I guess the question is whether this is expected behaviour, and if not any ideas?
No. Time Source Destination Protocol Info 1 0.000000 gmtpbx02.redmatter.com sil1.magrathea.net SIP/SDP Request: INVITEsip:441277849884@sipipgw.magrathea.net, with session description 2 0.001595 sil1.magrathea.net gmtpbx02.redmatter.comSIP Status: 100 Giving a try 3 1.103160 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=0, Time=0 4 1.124816 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=1, Time=160 5 1.142758 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=2, Time=320 6 1.163702 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=3, Time=480 7 1.184239 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=4, Time=640 8 1.203259 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=5, Time=800 9 1.223456 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=6, Time=960 10 1.243953 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=7, Time=1120 11 1.264504 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=8, Time=1280 12 1.284839 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=9, Time=1440 13 1.304590 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=10, Time=1600 14 1.323589 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=11, Time=1760 15 1.344672 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=12, Time=1920 16 1.359227 sil1.magrathea.net gmtpbx02.redmatter.comSIP/SDP Status: 183 Session Progress, with session description 17 1.364522 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=13, Time=2080 18 1.377484 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53974, Time=160, Mark 19 1.383466 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=14, Time=2240 20 1.397476 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53975, Time=320 21 1.403953 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=15, Time=2400 22 1.417484 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53976, Time=480 23 1.423616 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=16, Time=2560 24 1.437474 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53977, Time=640 25 1.444930 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=17, Time=2720 26 1.457475 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53978, Time=800 27 1.463341 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=18, Time=2880 28 1.477473 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53979, Time=960 29 1.484235 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=19, Time=3040 30 1.497483 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53980, Time=1120 31 1.503415 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=20, Time=3200 32 1.517474 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53981, Time=1280 33 1.523541 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=21, Time=3360 34 1.537472 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53982, Time=1440 35 1.543428 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=22, Time=3520 36 1.557567 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53983, Time=1600 37 1.563656 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=23, Time=3680 38 1.577496 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53984, Time=130238272, Mark 39 1.584747 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=24, Time=3840 40 1.597474 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53985, Time=130238432 41 1.603871 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=25, Time=4000 42 1.617465 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53986, Time=130238432 43 1.624224 lon-avon-four.magrathea.net gmtpbx02.redmatter.comRTP PT=ITU-T G.711 PCMU, SSRC=0x216DE2D9, Seq=26, Time=4160 44 1.637466 gmtpbx02.redmatter.com lon-avon-four.magrathea.netRTP PT=ITU-T G.711 PCMU, SSRC=0x1855F3A7, Seq=53987, Time=130238592
Many thanks, Neil _______________________________________________ FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org
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-- Anthony Minessale II FreeSWITCH http://www.freeswitch.org/ ClueCon http://www.cluecon.com/ Twitter: http://twitter.com/FreeSWITCH_wire AIM: anthm MSN:anthony_minessale@hotmail.com <MSN%3Aanthony_minessale@hotmail.com> GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com<PAYPAL%3Aanthony.minessale@gmail.com> IRC: irc.freenode.net #freeswitch FreeSWITCH Developer Conference sip:888@conference.freeswitch.org <sip%3A888@conference.freeswitch.org> googletalk:conf+888@conference.freeswitch.org<googletalk%3Aconf%2B888@conference.freeswitch.org> pstn:+19193869900
participants (5)
-
Anthony Minessale
-
Brian West
-
David Ponzone
-
Neil Burgess
-
Steven Ayre