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⟩ A 2MB PCM(pulse code modulation) has? a) 32 channels b) 30 voice channels & 1 signaling channel. c) 31 voice channels & 1 signaling channel. d) 32 channels out of which 30 voice channels, 1 signaling channel, & 1 synchronization channel.

Answer is D.

A 2Mb PCM line has 32 channels out of which 30 voice channels, 1 signaling channel, & 1 synchronization channel(time slot 0).

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