Bill (and everyone else), residential ISDN can be a bear, here's how you make it easier (in the US)...
When you contact the telecom, ask for the rep's email address and email the following information (below) while they're on the line. Most will understand this information much better than you asking them about ISDN and should be able to expedite your order(s) immediately. Every telecom still supports ISDN. They have to. They don't want to sell it to you, but 'ol Uncle Sam needs his Patriot Act supported. Two more things, you may want to open a new call for each ISDN codec and I slap the ticket/order number on each codec and plan for someone's lost day on the install.
I grabbed this info from some person's website years ago and I sincerely apologize for failing to note whom that person is/was to properly credit them for HOURS and HOURS of time saved. Enjoy:
1. If telco has implemented NIUF ISDN Ordering Codes (IOCs), request an ISDN BRI interface configured to: Bellcore Capability Package "M" - Alternate Voice/Circuit Switched Data on both B channels, no additional features. Package "S" - same as above plus caller ID - is also recommended.
2. If telephone co. is unable to understand the above request then ask that the following parameters are met:
National ISDN-1 switch type
2B1Q Line Code
D channel Signalling only
B1 alt. circuit switched data/circuit switched voice
B2 alt. circuit switched data/circuit switched voice
Dataline class: point to multi-point or point to point
TEI set to dynamic, one TEI per Dn
Terminal Type set to Type A
Display set to Y
EKTS set to NO
No Supplimental voice services
Call appearance preference set to Idle
It is also important that when your telephone company supports the following features, they are turned OFF at the telephone exchange:
Packet Mode Data
Multiline Hunt Groups
Multiple Call Appearances
Shared Directory Numbers
Accept Special Type Number
Network Resource Selector (Modem Pools)