Signalling System No. 7 (SS7) is a set of telephony signaling protocols developed in the 1970s that is used to setup and teardown telephone calls on most parts of the global public switched telephone network (PSTN).

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2022年1月10日 · SS7, short for Signaling System 7, is a protocol telecom companies use to communicate with each other. As an internetworking protocol between big companies, it contains a high degree of trust. That is, if you're allowed to speak SS7 to a server at all, you're allowed to say almost anything you want with it.

2022年1月20日 · Common Channel Signaling System #7 (SS7) separates the information required to set up and manage telephone calls in the Public Switched Telephone Network (PSTN) onto a separate packet switched network (The Signaling Network) rather than use the same circuit switched network that the telephone call is made on (The Voice Network).

Signaling System 7 (SS7) is an architecture for performing out-of-band signaling in support of the call-establishment, billing, routing, and information-exchange functions of the public switched telephone network (PSTN). It identifies functions to be performed by a signaling-system network and a protocol to enable their performance.

2019年5月4日 · This thesis presents an OPNET model and simulation of the Signaling System No.7 (SS7) network, which is dubbed the world's largest data communications network. The main focus of the study is to model one of its levels, the Message Transfer Part Level 3, in accordance with the ITU.T recommendation Q.704.

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The Signaling System No. 7 (SS7) is a globally used set of telephony signaling protocols that enables call setup, routing, billing, and information exchange between telephone networks.