<html><head><style type='text/css'>p { margin: 0; }</style><style type='text/css'>body { font-family: 'Times New Roman'; font-size: 12pt; color: #000000}</style></head><body>Does anyone know a Type 102 milliwatt number that I can call to adjust the RxGain? I have tried the telco but no one is responding on their number.<br><br>Regards,<br>Sanjay Rajdev<br><br>----- Original Message -----<br>From: "Matt Watson" <matt@mattgwatson.ca><br>To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users@lists.digium.com><br>Sent: Tuesday, May 27, 2008 5:02:24 AM GMT +05:30 Chennai, Kolkata, Mumbai, New Delhi<br>Subject: Re: [asterisk-users] Voice low on ZAP<br><br>On May 26, 2008 07:19:07 pm Sanjay Rajdev wrote:<br>> I have a Sangoma A200 card on my asterisk box, the sound that is received<br>> on the ZAP channel is very low, I is sometime difficult to hear the person<br>> on the other side of the line. Is there a way we can increase the volume on<br>> the ZAP channel<br>><br>><br>> Regards,<br>> Sanjay Rajdev<br><br>rxgain= <br>in zapata.conf<br><br>However, before you go blindly upping the value, you should know that you run <br>the risk of making echo problems worse by messing around with rxgain/txgain. <br>However, tuning rxgain/txgain is something that you *should* do on all your <br>FXO ports anyways... properly tuned ports will create far less echo than <br>those using default values most of the time.<br><br>Tuning rxgain/txgain is a little bit of a tedious task however, and I can;t <br>really say there are alot of good guides out there on how to do it.<br><br>The way I did it was first I tuned my rxgain by dialing a telco-owned <br>milliwatt test number (should be able to get this from your telco, i believe <br>its referred to as a Type 102 milliwatt test). You use that to tune rxgain, <br>then the way I tuned txgain was by using the app_milliwatt application to <br>essentially create my own milliwatt test number (need multiple FXO ports to <br>do this), so basically i;d dial out from one FXO port and back into the other <br>and adjust the txgain until i got it right...<br><br>You need to use ztmonitor to watch the levels as you adjust tx/rxgain, I <br>believe the magic number you want to hit in ztmonitor is around 14840 (thats <br>off the top of my head so i might be off)...<br><br><br>-- <br>Matt<br>http://www.mattgwatson.ca<br><br>_______________________________________________<br>-- Bandwidth and Colocation Provided by http://www.api-digital.com --<br><br>asterisk-users mailing list<br>To UNSUBSCRIBE or update options visit:<br> http://lists.digium.com/mailman/listinfo/asterisk-users<br></body></html>