Types of Transmission.

Communication is probably, three types depend upon the transmission modes. Those are,

Types of Transmissions:

  1. Simplex Communication: In this mode of serial communication, data can only be transferred from transmitter to receiver and not vice versa.
  2. Half Duplex Communication: this means that data transmission can occur in only one direction at a time, i.e. either from master to slave, or slave to master, but not both.
  3. Full Duplex Communication: full duplex communication means that data can be transmitted from the master to the slave, and from slave to the master at the same time!

                         



Serial Communication Terminologies

Now its time to learn some new words, which we will use frequently in the next few posts. There are many terminologies or ‘keywords’ associated with a serial communication. We will discuss all of them one by one:
  1. MSB/LSB: this stands for Most Significant Bit (or Least Significant Bit). You can refer to Mayank’s this post for more information on MSB and LSB. Since data is transferred bit-by-bit in serial communication, one needs to know which bit is sent out first: MSB or LSB.
  2. Baud Rate: according to Wikipedia, baud is synonymous to symbols per second or pulses per second. It is the unit of symbol rate, also known as baud or modulation rate. However, though technically incorrect, in the case of modem manufacturers baud commonly refers to bits per second.

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