try sangoma card which has a very good echo cancel solution. Best Regards
Matt ____________________________________________ High Performance Gigabit Clustering Appliance http://www.xgforce.com/loadbalancer.html eClustering Service http://www.xgforce.com/eService.html Gigabit 3U Tera Servers http://www.xgforce.com/teraserver.html Gigabit 2U Servers http://www.xgforce.com/server2u.html Gigabit 1U Servers http://www.xgforce.com/server1u.html __________________________________________________ ----- Original Message ----- From: "Darren Wright" <[EMAIL PROTECTED]> To: "Asterisk Users Mailing List - Non-Commercial Discussion" <[email protected]> Sent: Tuesday, October 18, 2005 9:43 PM Subject: RE: [Asterisk-Users] Terrible echo with Te110P and Adit 600 > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Kris > Boutilier > Sent: Wednesday, October 19, 2005 12:13 AM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: RE: [Asterisk-Users] Terrible echo with Te110P and Adit 600 > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] Behalf Of Darren > Wright > > Sent: Tuesday, October 18, 2005 7:42 PM > > To: Asterisk Users Mailing List - Non-Commercial Discussion > > Subject: [Asterisk-Users] Terrible echo with Te110P and Adit 600 > > > > 8 POTS lines - Adit 600 - TE110P - Dell Precision 530 Dual > > Xeon running 1.0.9 and 1.2 (tried both) > > > > The echo is insurmountable. I have tried everything, and the > > pots lines are clean. If I go from an FXO on the Adit 600 straight to > an FXS, I > > get no echo from an analog phone. > > No echo that you can hear - remeber that echo relies on two things, a > reflected signal and a delay between the transmission and the reception > of the signal long enough for the brain to perceive it. Looping the > channel bank will not introduce any delays. Passing through Asterisk > will, by design. > > ----------------------- > I meant that if I take an incoming POTS line to the FXO port, map that > to the FXS, and then make a call from the analog phone to the same > person that I tried calling on the Cisco 7960, the echo on the 7960 is > terrible, and the FXS port is just fine. > ----------------------- > > > I put an 128ms T1 echo canceller in between the adit and the > > TE110P, and the echo was still horrible. > > > > I finally disabled the Zapata echo canceller....and WHAMMO! It's > > perfect now. > > > > It sounds like something is confusing the zaptel canceller causing it to > distort the signal. It seems to be very sensitive to signals that are > too 'hot' (ie. too loud). Try lowering the gain on the signal going out > of the channel bank into the T1. If it's too quiet try increasing the RX > gain on the Zaptel side to compensate. > > ------------------------ > Agreed. I've tried them lowered to the point that DTMF becomes an > issue, and they have the volume pegged on the 7960's to even hear the > callers. I cannot adjust the TX/RX on the T1 coming out of the Adit > 600. I can adjust the FXO ports, as well as the TE110P. > > ------------------------- > > > > {clip} > > Any ideas so I don't have to spend $1000 on an echo canceller? > > > > I provided the patches to 1.2 that formed the basis for the kb1 echo > canceller, which is a derivative of the mark2 used in v1.0, and I still > use a 64ms Tellabs hardware echo can as well as the zaptel echo > canceller. Note that, in my case at least, the zaptel tends to handle > those echos that leak through the Tellabs gear - such as acoustic room > echos from speaker phones or cheap cordless handsets. > > If you need the echo issue resolved, stick with hardware cancellation. > If you don't want to spend $1k, take a look at > http://www.voip-info.org/wiki/view/Tellabs+Hardware+Echo+Cancellers. > It's not everyones cup of tea, but it works fine for me which is why I > shared it. > > The Zaptel echo can will be fixed so it performs predictably for > everyone eventually, but until then go with 3rd party T1 gear if you > want it reliably avoided. > ------------------------ > > Yup....got one running at home thanks to your WIKI. But for clients > moving forward, I need something a bit more mainstream. I'm > disappointed that the TE110P + adit 600 has been an issue on multiple > systems now, and that the software echo canceller has been a major > failure. > > It makes that solution WAY to expensive with the echo > canceller....that's well into the 2k range, and a good FXO - SIP gateway > with echo canceling is significantly less than that. > > Thanks for your help > > -Darren > > > _______________________________________________ > --Bandwidth and Colocation sponsored by Easynews.com -- > > Asterisk-Users mailing list > [email protected] > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
