Explain why framing and synchronization are important in a TDM system.
What will be an ideal response?
TDM requires that a demultiplexor stays synchronized with the multiplexor. Because a
demultiplexor cannot tell where a slot begins, a slight difference in the clocks used to time bits can
cause a demultiplexor to misinterpret the bit stream. To prevent misinterpretation, TDM used in the
phone system includes an extra framing channel as input. Instead of taking a complete slot, framing
inserts a single bit in the stream on each round.
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