1. How do I route calls without using DID's? I will have two automated attendants (Group Call 790 and 791) and I want half of the channels to go to one AA and the other half to the others? Can I define this in the incoming and routing Dial Plan or this is only used for DID's? The truth is that I do not understand to well the adding and deleting of digits when routing a call.
2. Can I use a 100D or 100 DS1 for this type of configuration (PRI through DMS 100 with B channel subgroup L1 flag set yes, B8ZS and ESF)
3. Why would I need a loop-back jack?