Multiplexing

Multiplexing

  • Multiplexing is the transmission of multiple data communication sessions over a common wire or medium.
  • Multiplexing reduces the number of wires or cable required to connect multiple sessions. A session is considered to be data communication between two devices: computer to computer, terminal to computer, etc..
  • It is also known asmuxing
  • Multiplexing originated intelegraphy, and is now widely applied in communications.
  • There are basic techniques used for multiplexing:
  1. Frequency Division Multiplexing (FDM):an analog technique where each communications channel is assigned a carrier frequency
  2. Time Division Multiplexing (TDM): a technique where a short time sample of each channel is inserted into the multiplexed data stream. Each channel is sampled in turn and then the sequence is repeated
  3. Statistical Time Division Multiplexing (STDM): uses intelligent devices capable of identifying when a terminal is idle. They allocate time only to lines when required
  4. Code division multiplexing(CDM)
  • A device that performs the multiplexing is called amultiplexer(MUX), and a device         that performs    the reverse process is called ademultiplexer

SET (Maharashtra) Examination 16th April 2017

Sr.No.NameDate
1 Commencement of online Application 27 Dec 2016
2 Last date for Applying Online 10 Jan 2017
3 Availability of Admit Card on website 06 Apr 2017
4 Date of Examination 16 Apr 2017

 

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