SS7

Signaling System #7 (SS7) is a set of telephony signalling protocols which are used to set up the vast majority of the world's public switched telephone network telephone calls. The main purpose is to set up and tear down telephone calls.It is usually abbreviated to SS7 though in North America it is often referred to as CCSS7, an acronym for "Common Channel Signaling System 7". In some European countries, specifically the United Kingdom, it is sometimes called C7 (CCITT number 7) and is also known as number 7 and CCIS7. (ITU-T was formerly known as CCITT.)
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Abbreviation for Signaling System No. 7.

A common-channel signaling system defined by the CCITT in the 1988 Blue Book, in Recommendations Q.771 through Q.774. Note: SS7 is a prerequisite for implementation of an Integrated Services Digital Network (ISDN).

Signalling System 7

Signaling System 7 (telephony protocol) 
Super Socket 7 (processor socket type)  For more possible definitions for SS7, click here
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