SS7 Question:
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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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