Dave Alan Caruana wrote: > The Grandstream phones are on a LAN, the * server connects to the phonelines > via the X100P cards. When I call from the Grandstream phones onto the PSTN > there is a VERY big amount of echo, ie. I can hear myself in the earpiece. >
> ----- Original Message ----- > From: "WipeOut ." <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Tuesday, August 05, 2003 8:50 AM > Subject: Re: [Asterisk-Users] SIP + Grandstream 100 + TDM100P = lots of > local echo, & questions about call transfers > > > > 1st question: > > > when i phone out > > > or receive a call from one of the SIP phones onto the PSTN, there is > > > a LOT of local echo in the handset .. the PSTN end of the call does not > > > here this echo, but it's VERY annoying on the SIP end of things .. > > > the echo seems to be about 0.3 seconds delayed to the speech .. > > > there is no echo on incoming voice, just an echo of my own voice > > > as I speak. My configuration : 1 - X-TEL SIP phone - phone handset connected to sound blaster (providing no accoustic echo by itself. Tested with Netmeeting) 2 - one single FXO board (on the Asterisk side) 3 - remote = PSTN telephone set or GSM telephone set The symptoms : - broad local echo (IP side) - tiny echo on the PSTN side What I have tried : 1 - change the handset with an USB one (nothing change but the sound quality : worst !) 2 - change the echo canceller attached to the FXO board (nothing really noticiable) 3 - change to IAX (changing the client software) : seems to cancel the echo (!?) Problem stays alive ! _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users