ISDN is a set of protocols. Any service provider can use the ISDNQuote:Capek) writes:
> 1) Why is AT&T, rather than my LEC, supplying ISDN service?
protocols for its service. If ATT has a service that it is legally
able to provide to an individual site, then it can use ISDN protocols
or any other that it sees fit.
ISDN is not a service; it is a means of providing services. Both the
LEC and AT&T (or any other service provider) will provide their
services using ISDN. ISDN is not an end in itself; it is a means
of communicating. It will make new serivces possible but will not
define or (hopefully) limit them.