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Question

ISDN stands for

A
Integrated Services Digital Network
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B
Input Source Data Network
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C
Integrated Source Destination Network
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D
None of the above
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Solution

The correct option is A Integrated Services Digital Network

ISDN stands for 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.

Integrated Services Digital Network (ISDN) is a set of communication standards for digital telephone connection and the transmission of voice and data over a digital line. These digital lines are commonly telephone lines and exchanges established by the government.

There are two types of ISDN: Basic Rate Interface (BRI) -- consists of two 64-Kbps B-channels and one D-channel for transmitting control information. Primary Rate Interface (PRI) -- consists of 23 B-channels and one D-channel (U.S.) or 30 B-channels and one D-channel (Europe).

The basic advantage of ISDN is to facilitate the user with multiple digital channels. These channels can operate concurrently through the same one copper wire pair. The digital signals broadcasting transversely the telephone lines. ISDN provides high data rate because of digital scheme which is 56kbps.


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