What is considered an acceptable time delay between two servers for a fair (not neccessarily great) voice quality. I use voipjet to connect my calls from iax2 to the pstn. Although the sound quality is good, there is considerable time delay, I wait seconds before the other party hear what I say. It becomes more of a walkie talk. When I ping voipjet, it takes about 600ms. would i take it that the extra dely is coming from the voipjet server to the pstn and i should try other servers or is there some other issues. I am behind a nat, would that make any difference? Can you provide me with Europe based iax termiantion other than voiptalk. I appreciate some of you guys telling me the ms ping to your providers so i can have an idea. Thanks a bunch. __________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/
chawki hammoud wrote:>What is considered an acceptable time delay between >two servers for a fair (not neccessarily great) voice >quality. > >I can't really deal with anything over 150ms, although regular users will tolerate ~200ms.>I use voipjet to connect my calls from iax2 to the >pstn. Although the sound quality is good, there is >considerable time delay, I wait seconds before the >other party hear what I say. It becomes more of a >walkie talk. > >When I ping voipjet, it takes about 600ms. >There's your problem. 600ms stinks.>Thanks a bunch. >No problem. I don't know if voicepulse can do Europe iax term, but it's worth looking into. I've had pretty good experiences with them so far ( excepting the price hike...but what can you do? ). Sean
Around 250ms max. Over that and you will have the walkie-talkie effect you are experiencing. So with you 600ms delay you are way over the top. There is also the delay on the call on the PSTN side you have to take into account. For example, I am in Europe and making a call to the UK via Voipjet is usually OK. But making a call to Romania is a lottery. Sometimes it is great, sometimes the delay is huge. And that has nothing to do with the internet delay which is more or less constant at around 180ms for me. But with 600ms, which is over half a second, you have problems.
thank you Rob: the problem is that I am experiencing about 3 secs latency although the ping is 600ms which is a round trip packet travel time. so i should experience about half a sec latency including the voipjet server response and the latency to the pstn. that is annoying, but nothing compared to about 3 sec. do you think the rest of the delay is due to voipjet slow response to the pstn network or some other issues would you be bale to clculate where the 3 sec is comming from thanks.>Around 250ms max. Over that and you will have the >walkie-talkie effect >you are experiencing.__________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/
--- Sean Kennedy <skennedy@tpno-co.org> wrote:> chawki, >> That additional 2.5 seconds of delay may be any > combination of things, > but I would look first to your ISP and their > backbone.I will try new isp in two weeks with better routing. Meanwhile, is there any known latency issues if Asterisk is behind a nat vs. asterisk with a real ip. this is how i configured my voipjet contextin iax.conf file [voipjet] type=peer host= 216.118.117.46 secret= secret number auth=md5 notransfer=yes context=default nat=yes careinvite=no I have just added nat=yes and careinvite=no thinking this might be the cause of the delay, but no change does iax maintains open communication at all times once the call starts?> Good luck! > > Sean > > chawki hammoud wrote: > > >thank you Rob: > > > >the problem is that I am experiencing about 3 secs > >latency although the ping is 600ms which is a round > >trip packet travel time. so i should experience > about > >half a sec latency including the voipjet server > >response and the latency to the pstn. that is > >annoying, but nothing compared to about 3 sec. > > > >do you think the rest of the delay is due to > voipjet > >slow response to the pstn network or some other > issues > >would you be bale to clculate where the 3 sec is > >comming from > > > >thanks. > > > > > > > > > >>Around 250ms max. Over that and you will have the > >>walkie-talkie effect > >>you are experiencing. > >> > >> > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com >http://lists.digium.com/mailman/listinfo/asterisk-users> To UNSUBSCRIBE or update options visit: > >http://lists.digium.com/mailman/listinfo/asterisk-users>__________________________________ Yahoo! Mail Mobile Take Yahoo! Mail with you! Check email on your mobile phone. http://mobile.yahoo.com/learn/mail
--- Sean Kennedy <skennedy@tpno-co.org> wrote:> chawki, >> That additional 2.5 seconds of delay may be any > combination of things, > but I would look first to your ISP and their > backbone.I will try new isp in two weeks with better routing. Meanwhile, is there any known latency issues if Asterisk is behind a nat vs. asterisk with a real ip. this is how i configured my voipjet contextin iax.conf file [voipjet] type=peer host= 216.118.117.46 secret= secret number auth=md5 notransfer=yes context=default nat=yes careinvite=no I have just added nat=yes and careinvite=no thinking this might be the cause of the delay, but no change does iax maintains open communication at all times once the call starts? thanks> Good luck! > > Sean > > chawki hammoud wrote: > > >thank you Rob: > > > >the problem is that I am experiencing about 3 secs > >latency although the ping is 600ms which is a round > >trip packet travel time. so i should experience > about > >half a sec latency including the voipjet server > >response and the latency to the pstn. that is > >annoying, but nothing compared to about 3 sec. > > > >do you think the rest of the delay is due to > voipjet > >slow response to the pstn network or some other > issues > >would you be bale to clculate where the 3 sec is > >comming from > > > >thanks. > > > > > > > > > >>Around 250ms max. Over that and you will have the > >>walkie-talkie effect > >>you are experiencing. > >> > >> > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com >http://lists.digium.com/mailman/listinfo/asterisk-users> To UNSUBSCRIBE or update options visit: > >http://lists.digium.com/mailman/listinfo/asterisk-users>__________________________________ Do you Yahoo!? Yahoo! Small Business - Try our new resources site! http://smallbusiness.yahoo.com/resources/