Monday, March 3, 2014

Signalling System No. 7

Signalling System No. 7 (SS7)

> Not  a single protocol but a set of  telephony signaling protocols which are being used to set up telephone calls.

>The main purpose is to set up and tear down telephone calls.

>Other uses include number translation, local number portability, prepaid billing mechanisms, short message service (SMS), and a variety of other mass market services.


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