____ is a digital communications technology developed in 1984 to replace the analog telephone system.
A)Switched 56K
B)ISDN
C)T1
D)T3

Question

Quizplus · Accepted Answer

ISDN (Integrated Services Digital Network) is a digital communications technology developed in 1984 to replace the analog telephone system. Switched 56K, T1, and T3 are also digital communications technologies, but they were developed before ISDN and were not specifically developed to replace the analog telephone system.

____ Is a Digital Communications Technology Developed in 1984 to Replace