Call processing

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In telecommunication, the term call processing has the following meanings:

1. The sequence of operations performed by a switching system from the acceptance of an incoming call through the final disposition of the call. See call control for a more complete description
2. The end-to-end sequence of operations performed by a network from the instant a call attempt is initiated until the instant the call release is completed.
3. In data transmission, the operations required to complete all three phases of an information transfer transaction.

Source: from Federal Standard 1037C