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  Home  Signalling System No 7 (SS7)

⟩ What is continuity test in SS7 and why it is performed?

COT is an automated diagnostic procedure performed in the

Signaling System 7 (SS7) Public

Switched Telephone Network (PSTN) between switches to

ensure that circuits are in service and not

experiencing excessive signal loss. This validation is

performed by sending tones across the bearer channel. It

is performed on a sampling basis. For instance, on 10

percent of the calls

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