What does ISDN mean?
Integrated Services Digital Network
Other definitions of ISDN:
All of our slang term and phrase definitions are made possible by our wonderful visitors. If you know of another definition of ISDN that should be included here, please let us know.
How to use the term ISDN:
There are no example uses of ISDN at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:
Married White Male ... Just letting you know your "undefined" is incorrect.
AB is Assignment Book