I have VWIC /2MFT G.703 dual E1 card on Cisco 3660 with cisco ios 12.1.(1)T both cards are detected and both controller are showing in my configuration file but problem is that when i configure controller E1 2/0 with channel-group 0 timesolts 1-31 with framing crc4 then it shows down and line code violations shows error counters and increases with very high rate. plz help me i want to configure both controllers with framed crc4. Regards Quddus Ullah Khan Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=11515&t=11515 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]