Hi,
I would suggest that you make sure it is not a soundcard problem. Also try other codecs than iLBC, iLBC had been buggy in the past in Asterisk. Le mardi 24 octobre 2006 à 20:50 +0200, Konrad Karl a écrit : > Hi, > > the following VOIP problem is giving me headaches..: > > 3 machines connected via VPN A---Z---B > Z is a openvpn server and also runs asterisk. > The ping times from A to B are in the range of about 30 msec. > All calls are made via the asterisk server using ILBC. > > I want to track down a wierd problem: when talking > from A to B (client software does not seem to matter, I > tried ekiga under linux, X-lite under windows XP) > then the sound starts to get distorted after about one minute > and totally unintelligible after about 2 minutes. > > A redial gives again clear sound for about 1 minute (perhaps even less) > > Then I made tcpdump traces on machine Z capturing all RTP traffic and > it seems that the timestamps of machine B are getting offset over the > time - the samplerate seems to be 8000.25 Hz or so - while machine > A keeps perfect time. B is a Laptop, a new Quanta machine, > exact name escapes me for the moment, with Intel ICH6 > chipset and Realtek ALC880 sound system. Before I updated the sound > driver, the times were differing by 5 seconds after a 30 seconds call > and I could hardly understand the other party during a few seconds > at the beginning. > > Now I want to listen to the captured RTP traffic to see if it is > already distorted before entering the asterisk server. > (preferably under Linux) > > Hints about how to do this would be very much appreciated. You can do it with ethereal, using PCMU or PCMA, but nto any other codec. > > NB. today I bought a USB headset, perhaps it will cure this problem > but I am still curious. > > Best greetings, > Konrad > > _______________________________________________ > ekiga-list mailing list > [email protected] > http://mail.gnome.org/mailman/listinfo/ekiga-list -- _ Damien Sandras (o- //\ Ekiga Softphone : http://www.ekiga.org/ v_/_ NOVACOM : http://www.novacom.be/ FOSDEM : http://www.fosdem.org/ SIP Phone : sip:[EMAIL PROTECTED] _______________________________________________ ekiga-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/ekiga-list
