I have searched for how to locate echo cancelation on SIP clients, but cant find anything and echocancel=y doesnt seem to have any effect. Configuration: CVS-HEAD from last month iPAQ h5500 with SJPhone (gsm/ulaw/alaw) Problem description: When I place or receive a call I hear a faint delayed echo of myself. The other party hears a really bad nonmuted echo that makes the call unusable. Aside from the voip-info page on echo cancelation, can anyone suggest directives for sip.conf or similar to play with for echo cancelation. I have looked into sjphone as the cause, after speaking with developers there it was suggested to see if my asterisk box is the cause. Any suggestions? -- Trixter http://www.0xdecafbad.com UK +44 870 340 4605 Germany +49 801 777 555 3402 US +1 360 207 0479 or +1 516 687 5200 FreeWorldDialup: 635378 -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: This is a digitally signed message part Url : http://lists.digium.com/pipermail/asterisk-users/attachments/20050524/1af42dc1/attachment.pgp
> -----Original Message----- > From: asterisk-users-bounces@lists.digium.com > [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of > trixter http://www.0xdecafbad.com > Sent: Wednesday, 25 May 2005 2:39 PM > To: Asterisk Users Mailing List > Subject: [Asterisk-Users] echo problem > > I have searched for how to locate echo cancelation on SIP > clients, but cant find anything and echocancel=y doesnt seem > to have any effect. > > Configuration: > CVS-HEAD from last month > iPAQ h5500 with SJPhone (gsm/ulaw/alaw) > > Problem description: > When I place or receive a call I hear a faint delayed echo of myself. > The other party hears a really bad nonmuted echo that makes > the call unusable. > > Aside from the voip-info page on echo cancelation, can anyone > suggest directives for sip.conf or similar to play with for > echo cancelation. >Have you tried Xten's softphone for the ipaq? I am using it on a 5550 and a 6325 and the quality is as good as a regular phone. It just worked! I had echo problems with sjphone on the 5550, and I never even tried it on the 6325 because of that problem.> > I have looked into sjphone as the cause, after speaking with > developers there it was suggested to see if my asterisk box > is the cause. >Do you have echo problems with any of the other phones on your asterisk server?> Any suggestions? > > > -- > Trixter http://www.0xdecafbad.com > UK +44 870 340 4605 Germany +49 801 777 555 3402 > US +1 360 207 0479 or +1 516 687 5200 > FreeWorldDialup: 635378 >
Ok I tried Digium TDM400 cards, I tried X100p cards, I tried Clipcomm CG-410 4 FXOs device. Now I just ordered a few Sipura 3000. With the Digium TDM04B cards (4 FXOs) and X100p cards I tried the following : echocancel=yes echocancelwhenbridged=yes echotraining=yes (I tried 800 with TDM04B cards but it didn't made any difference) rxgain= I tried from -8.0 to 10.0 txgain = I tried from -8.0 to 10.0 by the way I live in Canada and the provider is Bell Canada for all lines (I have over 10 lines at one place and 3 lines at another places) I tried on a bunch of different computers. I tried on a P4, a dual Xeon, a dual AMD Opteron, a bunch of Macs too (for X100p cards) a PowerMac 8500, 9600, 9650, G3 Desktop, G3 B&W and G4. I have echo problem on all of them. I even tried on different OS. Fedora Core 1, 2 and 3 for the PCs and Yellow Dog Linux 3.01 and 4.0 for the Macs. I even tried the Clipcomm CG-410 on OS X (10.2.8, 10.3.x and even 10.4) I'm using Cisco IP Phone 7960 with SIP firmware 7.3 and a few Granstream GXP-2000. The echo is a lot worst on Cisco phones. Now I just ordered 5 Sipura 3000 to see if that will remove the echo. I can't understand why it wouldn't work with the Digium cards... If someone has a clue to help me figure out how to remove this echo well let me know as right now I'm considering that all Digium cards sucks... For Clipcomm well the echo was there and I can't get Caller ID to work so it's useless... Thanks Martin
I was having problems and your tip helped, my handset showed a polarity reversal... Now we'll see how well it works... Thanks, Greg -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Andrew Kohlsmith Sent: Wednesday, June 08, 2005 2:27 PM To: asterisk-users@lists.digium.com Subject: Re: [Asterisk-Users] Echo problem On Wednesday 08 June 2005 13:37, Martin Roy wrote:> rxgain= I tried from -8.0 to 10.0 > txgain = I tried from -8.0 to 10.0Unless you are making measurements and actually analyzing the results you're only stabbing in the dark playing with these things.> by the way I live in Canada and the provider is Bell Canada for all > lines (I have over 10 lines at one place and 3 lines at another > places)Bell's usually pretty good (I'm a Bell customer too) so unless you've got seriously screwey lines (unbalanced, reversed tip/ring, grounding issues) you should not be having this kind of problem. Take a read here. I reference this document continuously: http://lists.digium.com/pipermail/asterisk-users/2004-November/071301.ht ml Yes, it's work and yes, you may have some trouble doing it/locating the numbers for milliwatt and quiet term but you know what, this is engineering and this is how to do it correctly. Everything else is just pissing around hoping for a solution rather than making educated guesses and anlyzing the results.> I tried on a bunch of different computers. I tried on a P4, a dual > Xeon, a dual AMD Opteron, a bunch of Macs too (for X100p cards) a > PowerMac 8500, 9600, 9650, G3 Desktop, G3 B&W and G4. > > I have echo problem on all of them. I even tried on different OS. > Fedora Core 1, 2 and 3 for the PCs and Yellow Dog Linux 3.01 and 4.0 > for the Macs. I even tried the Clipcomm CG-410 on OS X (10.2.8, 10.3.x> and even 10.4)You're just stabbing in the dark here.> I'm using Cisco IP Phone 7960 with SIP firmware 7.3 and a few > Granstream GXP-2000. The echo is a lot worst on Cisco phones.Interesting.> Now I just ordered 5 Sipura 3000 to see if that will remove the echo. > I can't understand why it wouldn't work with the Digium cards...> If someone has a clue to help me figure out how to remove this echo > well let me know as right now I'm considering that all Digium cards > sucks... For Clipcomm well the echo was there and I can't get Caller > ID to work so it's useless...Follow the instructions on the link provided. Find the milliwatt and quiet term numbers for your local CO. Corner a Bell tech (most of them are really really good guys) and explain that you're trying to interface to a telephone line with your computer and you need the quiet and milliwatt numbers in order to ensure your gains are set correctly. It's hidden info but not secret info. Make sure your tip and ring aren't reversed. Make sure one's not grounded or that there's not something else squirrely with your lines. There is a (simple) FIR filter available on the TDM400P FXO modules. Use the fxotune util to properly adjust it. Echo is able to be eliminated, it's just sometimes a real tricky bugger to track down the cause. Regards, Andrew _______________________________________________ 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
> -----Original Message----- > From: Andrew Kohlsmith [mailto:akohlsmith-asterisk@benshaw.com] > Sent: Wednesday, June 08, 2005 11:27 AM > To: asterisk-users@lists.digium.com > Subject: Re: [Asterisk-Users] Echo problem > > > On Wednesday 08 June 2005 13:37, Martin Roy wrote: > > rxgain= I tried from -8.0 to 10.0 > > txgain = I tried from -8.0 to 10.0 > > Unless you are making measurements and actually analyzing the > results you're only stabbing in the dark playing with these things. >{clip}> > Take a read here. I reference this document continuously: > > http://lists.digium.com/pipermail/asterisk-users/2004-November/071301.html > > Yes, it's work and yes, you may have some trouble doing it/locating the > numbers for milliwatt and quiet term but you know what, this is engineering > and this is how to do it correctly. Everything else is just > pissing around hoping for a solution rather than making educated guesses and > anlyzing the results. >You may also wish to review http://lists.digium.com/pipermail/asterisk-users/2005-March/096426.html which attempts to explain the causal relationship between gain and echo - ie. Nework Loss Planning. A neutral configuration may not be the optimal soloution in all cases. Kris Boutilier Information Systems Coordinator Sunshine Coast Regional District
Hi , I am trying to use a telephone Atcom AT323 Both in SIP mode and in IAX mode, I have a lot of echo on a large number of number called (NOT ALL, it depends on the network I reach) I see that using in /etc/asterisk/capi.conf echosquelch=1 ;echocancel=1 echotail=64 Everithing is really good (not perfect but infinitely better) The question is: where can I find the meaning of these parameters ? I searched a lot, but I didn't find anything. In other words: why 64 ? I tried 128 with no effect ; And the value of echocancel ? should it be 1 or yes ? If anybody is able to give me a link to the meaning/values of these parfameters I will be very happy ! I am using 3 FritzCard bri and chancapi thanks in advance, Andrea Chi ricevesse questa mail per errore e' gentilmente pregato di cancellarla. Visitate il sito http://www.frameweb.it
I have installed Asterisk and when I hangup the zap channel Asterisk show this
message:
Feb 13 17:45:49 WARNING[1748]: chan_zap.c:6511 handle_init_event: Detected
alarm on channel 4: Red Alarm
Feb 13 17:45:49 WARNING[1748]: chan_zap.c:1586 zt_disable_ec: Unable to
disable echo cancellation on channel 4
Feb 13 17:45:49 WARNING[1748]: chan_zap.c:6511 handle_init_event: Detected
alarm on channel 5: Red Alarm
Feb 13 17:45:49 WARNING[1748]: chan_zap.c:1586 zt_disable_ec: Unable to
disable echo cancellation on channel 5
Feb 13 17:45:49 NOTICE[1745]: chan_zap.c:8451 pri_dchannel: PRI got event:
Alarm (4) on Primary D-channel of span 2
Feb 13 17:45:49 NOTICE[1745]: chan_zap.c:8458 pri_dchannel: pri_shutdown
Feb 13 17:45:49 NOTICE[1748]: chan_zap.c:6506 handle_init_event: Alarm cleared
on channel 4
Feb 13 17:45:49 NOTICE[1748]: chan_zap.c:6506 handle_init_event: Alarm cleared
on channel 5
Feb 13 17:45:49 NOTICE[1745]: chan_zap.c:8451 pri_dchannel: PRI got event: No
more alarm (5) on Primary D-channel of span 2
What I can doing?
Thanks
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