Assuming you can get ISDN, your next question is probably
"What does it cost?" ISDN rates (also called “tariffs”),
vary by phone company, and ISDN pricing generally has three
- Installation Charge - this is a one time charge to have
the ISDN service installed. Part of this charge may be waived
if you commit to keep your ISDN line for a period of time.
- Monthly Charge - this is a recurring monthly charge.
- Usage Charges - this is a charge associated with use of
the ISDN line. Typically it is not more than a couple of
cents per minute. The monthly charge may include a certain
number of hours of free usage each month. Some packages
have no usage charges at all, or may waive usage charges
during evenings and weekends.
If you expect to make a lot of local ISDN calls within your
organization, you can sometimes get CENTREX ISDN service,
which has no usage charges for calls to other local numbers
belonging to the same organization.