Yes, I will definitely let everyone know what/if I find anything. Currently I've spent some time talking with Rich, and done many more tests under his guidance, so far we are leaning towards a Asterisk problem, not the PSTN.
On Thu, 2004-07-01 at 18:27 -0400, [EMAIL PROTECTED] wrote: > Kindly post it back here when you find something, IF you find something, as > Ive been fighting the exact same problem here, and followed the same route > you guys did. Ive given up at this point. At this juncture, Im convinced > the telco is sending it out intentionally....or space aliens are bringing > it...its only on the PSTN lines...Versleazon in my case....because if this > problem isn't curable, then asterisk is dead in the water as far as Im > concerned. > I simply can not use a system that sounds like people talking are in a > tunnel. At this point, this is the only "point of failure" that kills the > whole idea of using this as a "real" switch. > > Now, as far as echo cancellation, Ive looked as some of the docs, like the > motorola paper, > http://e-www.motorola.com/files/dsp/doc/white_paper/PTECANWP.pdf and some > purely theoretical stuff, but their math is beyond me. > Unless someone has developed a whizz-bang improvement over the stuff I > read, the point of transiting from a two wire to a 4 wire model will always > cause echo, period, done, abandon the idea, lets go do something else. The > limiting factor I see, is our software echo handling doesn't have the > computational horsepower attached (no cpu, or stealing cpu cycles from main > cpu) to be effective. Does this mean another piece of expensive hardware? > Dedicated proprietary chips like the Moto? I'm thinking so. > > SO, This is it, critical point of failure...cant go on, at least I cant use > it. Yes, * does a lot of other stuff just fine, but this is the immovable > object, at least for me.. This is something it must do and do well or its > over. > Ive been holding my breath, hoping something pops up, but it hasn't. > > > > At 09:21 7/1/2004, you wrote: > > > Over the last couple weeks I've tried everything I could get my hands on > > > in an attempt to get rid of my echo problems. Using a CVS checkout of > > > just yesterday, I've tried every echo cancellation routine in zconfig.h > > > (including Mark2 w/Aggressive) , as well as the echotraining=800 > > > mentioned on this list just last week. > > > > > > While some things worked better then others, I would consider none > > > acceptable solutions in my situation. Playing with rx/tx gain values > > > just seemed to quiet the voice down and along with that the echo > > > happened to be less noticeable. I could almost get the echo to disappear > > > with a low enough rx/tx gain, but then the voice could barely be heard, > > > or DTMF tones stopped working. > > > > > > So whats the next step? > > > > > > I only get echo when dialing over the PSTN. Using Nufone to dial a PSTN > > > number results in absolutely zero echo. Do I put in a request for a > > > Telco technician to come out and take a look at the lines? > > > > > > One page on the Wiki says: > > > > > > "Most of the telco's have technicians with the equipment necessary to > > > help find the problem if the problem really is their outside plant. > > > However, getting to that person can be a real challenge." > > > > > > Any suggestions on ways to overcome the challenge of getting the right > > > technician on the phone? > > > >Mike, > > > >Contact me off list and let's see if we can isolate the issue. Can't > >tell from the words you've used what steps you've gone through to date. > > > >Rich > > > > > >_______________________________________________ > >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 > > > _______________________________________________ > 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 -- Mike Benoit <[EMAIL PROTECTED]> _______________________________________________ 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
