Hi, 1.Still you face the audio problem or not ? Yes still no audio 2. Did you install libss7 while there was libpri installed or a Fresh installation of the server . libpri was also installed and is there now as well. libss7, asterisk and dahdi was installed in order as mentioned in readme file. 3. in chan_dahdi.conf echocancel and echocancelwhenbridged=yes =yes if you uncomment echocanceller=mg2,1-31 After doing this, I am still getting same warning: WARNING[9708]: chan_dahdi.c:2683 dahdi_enable_ec: Unable to enable echo cancellation on channel 1 (No such device) --- Kind Regards, Deepika Nijhawan VoIP Engineer Oxygen8 Communications T: +44(0) 871 434 9151 +44(0) 121 620 9151 Email: deepika.nijhawan at oxygen8.com Skype: deepika-nijhawan W: <http://www.oxygen8.com/> www.oxygen8.com This communication contains information which is confidential and may also be privileged. It is for the exclusive use of the intended recipient/s. If you are not the intended recipient/s please note that any distribution, copying or use of this communication or the information in it is strictly prohibited. If you have received this communication in error please notify us by email or by telephone (08082060808) and then delete the email and any copies of it. This communication is from Oxygen8 Communications UK Ltd - Company Number 03383285. Registered Address; 12th Floor, Lyndon House, 58-62 Hagley Road, Birmingham, B16 8PE. VAT Registration Number: 792 4494 89 -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-ss7/attachments/20100519/2878b319/attachment.htm