Chad Osmond
2005-Aug-16 07:07 UTC
[Asterisk-Users] Echo calibration with ztmonitor and a testlinefrom a telco
The value of 14800 is correct. I had issues with my TDM400p with 2x FXO's installed and using the Xlite client. I could not get the echo stable at the initial call. Changing to a hard phone made everything work correctly. I still had problems with the off location I called, but mostly worked great. To see the TX gain I created an extension with the Milliwatt command attached to it and called it from the PSTN, then on a second line I called the milliwatt line at my CO and compared the volumes by ear (instead of looping around) and it worked great. Chad -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Ken Dresdell Sent: August 16, 2005 9:55 AM To: 'Asterisk Users Mailing List - Non-Commercial Discussion' Subject: RE: [Asterisk-Users] Echo calibration with ztmonitor and a testlinefrom a telco Thanks for your help, I have already seen this page but since the head version of ztmonitor is able to show the real number value of the rx and tx (ztmonito -vv), I was thinking that maybe someone could confirm to which value we want the rx of ztmonitor when we try to calibrate the system with a test line from a Telco and a TDM card. The only information that I have found is that I have to setup my rxgain to get a 14800 value with ztmonitor but that is not working. Any others suggestions ? Regards Ken -----Original Message----- From: asterisk-users-bounces@lists.digium.com [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Dan Littlejohn Sent: 15 ao?t 2005 15:42 To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [Asterisk-Users] Echo calibration with ztmonitor and a test linefrom a telco On 8/15/05, Ken Dresdell <kdresdell@globetrotter.net> wrote:> Hello everyone, > > Does anyone have experience with echo calibration for TDM card with > rxgain and txgain (Zapata.conf) and ztmonitor (CVS Head)? > > I have found very few information about it and what I have found makes > me confused. I have a phone number provided by my TelCo(1004 hz at0db)> and from what I saw, I am supposed to calibrate my rxgain to get a14800> value with ztmonitor . > > Here is the information I found: > > >http://lists.digium.com/pipermail/asterisk-users/2004-November/071301.ht> ml > > > Does anyone have successfully reduced echo with this procedure? > > My main problem is that when I get 14800 with ztmonitor, I have now a > rxgain=14 and it seem to be too high for asterisk and I cannot dialout> anymore. > > Any suggestions? > > > Thanks in advance for your pointers > > Regards > > Ken > > > _______________________________________________ > 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 >I have been doing a bit of this too lately. This was also useful. http://www.asteriskdocs.org/modules/tinycontent/content/docbook/current/ docs-html/x1695.html Dan _______________________________________________ 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 _______________________________________________ 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
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