amriddle01 - the BRI cards are not for sale in NA. I suppose I could purchase IPO BRI card plus a BRI modem from UK - however many PRIs at customer site are not built for "long distance" circuit switched data calls - the carriers won't pass the traffic - and if they do, the cost is sky high! And more customers have only SIP/analog...
tlpeter - US based standard BRI was two 64K B channels and a small D channel (2B+D), although you could get 1B+D and 0B+D (for ATM machines, etc). We installed many in the early 90s when broadband wasn't available for internet. Our local carrier had an "ISDN Anywhere" program that made ISDN available in areas where the local CO wasn't equipped. They'd extend it from another office at no extra cost. Worked great to extend dialtone from a regional office - allowing customer to avoid lots of toll charges. In the end, I suspect part of the reason they didn't catch on was the maintenance techs couldn't put their butt set on it at the demarcation point to see if it worked.
Mike