Evolution of the telephone system
Voice on IP: Internet, fixed and mobile
Article REF: TE7532 V1
Evolution of the telephone system
Voice on IP: Internet, fixed and mobile

Author : Jérôme PONS

Publication date: May 10, 2009 | Lire en français

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1. Evolution of the telephone system

References in square brackets are developed in the For further information section [Doc. TE 7 532] at the end of [TE 7 532].

1.1 Circuit telephony and voice over IP

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1.1.1 Telephony on circuit

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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