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Question

ISDN's basic Rate Interface(BRI) is also known as?

A
23B+D
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B
23D+B
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C
2B+D
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D
2D+B
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Solution

The correct option is C 2D+B

ISDN's basic Rate Interface (BRI) is also known as 2D + B.

Basic Rate Interface (BRI) is one of the two levels of services provided by Integrated Services Digital Network (ISDN). BRI is made for home and small-scale enterprise use.

Both rates include a number of B-channels and a D-channel for transmission of data. The B channel carries data, voice, and other services, while the D channel carries controlling and signaling data.


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