> Hello... > We're attempting to track down an intermittent echo issue. Our setup is > <phone>sip<asterisk>sip<tnt>pri to carriers. We have less than 2 ms latency > on the networks (FTTx), totally SIP w/ G711u. The party hearing the echo is > the subscriber using sip. The PSTN users does not hear the echo. > > We should be note that there is zero echo when calling sip to sip with or > without reinvites enabled. > > We have several different phones; linksys, polycom, & grandstream (both atas > and phones). It's difficult to reproduce the problem regularly so isolation > is an issue. >
I had intermittent echo when I first deployed TNT's as well. It took a while to track down. Adjust the volume on the TNT lower until the echo goes away. Here is what I had to set mine to: In each T1 config: set line-interface voip-gain-control input-pad = 3db-loss set line-interface voip-gain-control output-pad = 3db-loss Hope this helps. JR -- JR Richardson Engineering for the Masses _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
