In the 1960s,AT&T created a service known as ____,which multiplexed digital data and digitized voice onto a high-speed telephone line with a data rate of 1.544 megabits per second.
A) ISDN
B) T-1
C) SONET
D) SDH

Question

Quizplus · Accepted Answer

T-1 is a digital transmission system introduced by AT&T in the 1960s, which multiplexed digital data and digitized voice onto a high-speed telephone line with a data rate of 1.544 megabits per second. ISDN, SONET, and SDH are also digital transmission technologies, but they were developed later and have different specifications and capabilities.

In the 1960s,AT&T Created a Service Known as ____,Which Multiplexed