<div>Hi </div>
<div> </div>
<div> </div>
<div>Can anyone help me with my problem?</div>
<div> </div>
<div>We deployed an asterisk box with libss7. We used <font size="3">OpenVox's D410P/D410E cards.</font></div>
<div>Everything is up and running (CIC etc.), except when we tried calling we get echo on Voip extensions.</div>
<div> </div>
<div>We tried isolating it. </div>
<div> </div>
<div>PSTN -> Asterisk -> SIP extensions ..... noticeable echo</div>
<div> </div>
<div>PSTN -> Asterisk -> PSTN ..... no echo</div>
<div> </div>
<div>SIP -> Asterisk -> SIP ..... no echo</div>
<div> </div>
<div>SIP -> Asterisk -> PSTN .... echo on SIP extension</div>
<div> </div>
<div>We tried every zapata.conf echo canceller combination and we also tried compiling other zaptel echo cancellers including OSLEC. </div>
<div>But to no avail.</div>
<div> </div>
<div>Do I need to do anything else to enable echo cancelling for libss7?</div>
<div> </div>
<div>Thanks in advance </div>
<div> </div>
<div>Chris</div>
<div> </div>