Hi, I just have a pretty simple question in which I'm really confused about... When do I use CAS-group as opposed to PRI-group I thought I only use CAS-group is I'm configuring Channelized T1 timeslots and PRI-group for PRI lines but I see some sample configs at Cisco that uses CAS-group for PRI lines, too. If I use CAS-group for a PRI, wouldn't I be "robbing bits" off each timeslots, too? Also, I can use CAS-group and PRI-group for incoming modem calls, too, by indicating it in service type for CAS-group and configuring the D-channel for incoming modem for the PRI (?) Thanks for the help! Kenneth _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]