Page 37 - eBOOK FUNDAMENTAL OF TELECOMMUNICATION NETWORK
P. 37

WHAT IS





                                           PSTN?











                   Public  Switched  Telephone  Network  or  PSTN  is

                   the       conventional               circuit-switched                 telephone

                   network.




                   PSTN  also  known  as  Plain  Old  Telephone  System

                   (POTS).




                   This  is  the  system  that  has  been  in  general  use  since

                   the late 1800s.



































                                                            27
   32   33   34   35   36   37   38   39   40   41   42