Call processing

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.

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