ISDN Services
In adverse to the CAS and R2 signaling, which accommodate alone DNIS, ISDN offers additional
supplementary casework such as Call Waiting and Do Not Disturb (DND). ISDN applications
include accelerated angel applications (such as Group IV facsimile), additional
telephone curve in homes to serve the telecommuting industry, accelerated book transfer,
and video conferencing. Voice account is additionally an appliance for ISDN.