What is the full form of ISDN?

ISDN stands for Integrated Services Digital Network.

Integrated Services Digital Network.

Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network. It was first defined in 1988 in the CCITT "Red Book

answer; /// the rich had great responsibilities to society;