ISDN Subaddresses

Subaddressing is a capability provided on ISDN lines that allows more information than just a single telephone number to be used when dialing. This additional information can specify an individual telephone extension to ring or, in a computing environment, a particular application to be alerted. Other parameters that can be passed can describe the required aspects of a requested modem connection, such as rate and timing.

Software for developers
Delphi Components
.Net Components
Software for Android Developers
More information resources
Unix Manual Pages
Delphi Examples