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SS7
Signaling System 7. The international high-speed signaling backbone used for the public-switched telephone network.

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Posted by waqasahmad

It is basically a signaling protocol used in the PSTN to co POTS telephone calls including channel setup, session maintenance tear down.

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Posted by HamidAliKhan

Signaling system 7. A trunking protocol used in the PSTN to co POTS telephone calls including channel setup, session maintenance tear down.

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Posted by dandelo