Signalling System No. 7

Rarity: Uncommon

A topic a little better known than average, read and translated beyond its own country.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

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Arts and letters

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5

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What Wikipedia says

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).

Excerpt from the Wikipedia article “Signalling System No. 7”, under the CC BY-SA 4.0 license. Read the article on Wikipedia