i got a 3640 router at branch site connected with a 7513 at center cite by frame relay .I want to transfer data and voice seperately, so i set up 2 subinterfaces on 3640.But could the 3640 differ them by the specific protocol port(UDP OR TCP PORT ),that is sending data to pvc 1,voice over ip to pvc 2?Should i use access list or anything like this? Thanks frank _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]