Hi, You need to alter few files to reduce echo on Zaptel hardware and this solution my solve you problem Regards Steve Manager Sales http://www.astcode.com > Message: 1 > Date: Tue, 18 Apr 2006 20:03:17 -0700 (PDT) > From: leonimar cape <leo_mac_ph@xxxxxxxxx> > Subject: [asterisk-ss7] asterisk oh323 - chan-ss7 echo problem > To: asterisk-ss7@xxxxxxxxxxxxxxxx > Message-ID: <20060419030317.55521.qmail@xxxxxxxxxxxxxxxxxxxxxxx> > Content-Type: text/plain; charset=iso-8859-1 > > Hi > > Can someone give a suggestion on what I should do to > omit the echo. Here is may scenario > > --- h323 --- chan-ss7 --- > A---| |--------| |--------------| |----B > --- --- --- > Nextone Asterisk DMS > > The calling party can hear every words he/she say > after 1 to 2 seconds. But the called party can hear A > with no echo and the quality is clear. I have already > tried it in both digium (TE410P) and sangoma card > (AT104) and the results where the same. Is there any > way that I can cancel the echo? Any particular > settings that I have to change in the settings of the > asterisk? > > Thanks in advance > > Regards, > > Leonimar > >