Dec 27, 2009
Computerized local PABX
Even with the recent birth of the World Wide Web and other new generation digital communication techniques the public switched telephony network is still one of the most important communication systems in the world. The reasons for this lie in the two words public and switched. A public telephone network is one that gives anyone the ability to connect to it, and a switched network means that anyone can connect to anyone else.
Author:-Michael Thomas Cowls
Source:- The University of Queensland
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