⟩ 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).