Hello Devashish, hard to tell what the cause of this behaviour is. Can you post the config of the 3640 as well as the output of the 'debug isdn q931' command ? There is a good document on the Cisco site with regard to Dial Technology Connectivity, that might help you as well:
http://www.cisco.com/warp/customer/471/callin_calls.html#third Regards, Georg Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=36188&t=36185 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]