what is ISDN? Explain BRJ and PRJ in detail.
172 Views|Posted 2011-01-06 22:28:08
Asked by Manish Kashyap
1 Answer
Answered by
2011-01-07 15:21:52
Integrated Services Digital Network (ISDN) is a set of communications 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 1984 in the CCITT red book.
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