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In time-division multiplexing, there are 8000 samples for a digital signal-0 channel that uses 8 kHz sample rate and 8 bit PCM code. The line speed will be:
1. 56 kbps
2. 64 kbps
3. 76 kbps
4. 84 kbps

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Correct Answer - Option 2 : 64 kbps

Concept:

Line speed is defined as the number of bits per second that can be transmitted along a digital network.

It is also known as the bit Rate, which is given by:

Line speed (Rb) = mnfs

Where:

n = No. of bits used

fs = sampling freq.

m: No. of signals (messages) multiplexed.

Calculation:

Given: fs = 8 kHz, n = 8 bits

The number of signals multiplexed is not given, so the given TDM is normal PCM only, where only one signal is transmitted.

∴ m = 1

Rb = 8 × 8 kHz

Line speed (Rb) = 64 kbps

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