1. Evolution of the telephone system
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1.1 Circuit telephony and voice over IP
Circuit telephony refers to the use of a telephone set (analog or digital) connected to a switched telephone network (PSTN), which may be public (PSTN) or corporate, or to an integrated services digital network (ISDN). The PSTN network...
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Evolution of the telephone system
Voice over IP in new convergent architectures
Bibliography
Voice over IP protocols
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