as we know ,3620 has 2 NM slot ,3640 has 4 slots . if i use NM-HDV-1E1-30E,how many such NM could each 3620 or 3640 support at maximum? and we also could use NM-HDV-2E1-60 . Does the router have the capability limit to support NMs? AS5300 could support 4 E1 at max. Thanks . frank _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]