Hi Mesbah, It can be possible. One thing, on Telsis trunk card which is connected to this Asterisk server, I have enabled only first E1 and rest 7E1 are disabled on both Telsis and Asterisk. Even if I change cables from first card to second card, still 7E1s are blocked and it can be possible that signaling cable is not on the first E1 on asterisk side. So, do you recon I enable all 8E1's and configure them as SS7 with 16th channel as dchan or shall I leave only 1E1 configured as its now. --- 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/20100518/932b1ac1/attachment-0001.htm