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Supervision (telephony)

In telecommunication, supervision is the monitoring of a telecommunication circuit for telephony to convey to an operator, user, or a switching system, information about the operational state of the circuit. The typical operational states of trunks and lines are the idle and busy states, seizure, and disconnect. The states are indicated by various…

Calling party control, Operation & Open switching interval

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Overview

Requirement

Operation

Supervision signals

E&M signaling

Calling party control

Open switching interval

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Supervision (telephony)

Nodes42
Edges41
Triples1
Avg. degree1.95
Density0.047619
Components1

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Important terminology

call disconnect supervision called telephone signal system answered circuit switching party used switch may indicate line calling also wink answer

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
step-by-stepinstance ofcalls would not fail if there was an open on one of the trunks.Some older toll equipment also required the wink when connecting to local switches0.80text

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