Crosstalk caused by coupling between carrier and noncarrier circuits.
Note: If the interaction crosstalk is, in turn, coupled to another carrier circuit, that crosstalk is called "indexing. "

Pertaining to a communications environment in which more than one party is equipped and ready to participate actively in a session or a protocol. [After X9.42]
Note: Common usage of the term refers to a session where at least one of the parties is human and another of the parties is a software application.

A unidirectional message, transmitted via a data channel, that requires a response in order for work to proceed logically.

See Electronic Program Guide.

In an integrated services digital network (ISDN), a telecommunications service that facilitates a bidirectional exchange of information among users or among users and hosts.
Note: Interactive services are grouped into conversational services, messaging services, and retrieval services.

On a data recording medium, an area used to indicate the end of a block or physical record.
Note: Examples of interblock gaps are the gaps between blocks on magnetic tape and disks.

1. To stop a telephone call directed to an improper, disconnected, or restricted telephone number, and to redirect that call to an operator or a recording.
2. To gain possession of communications intended for others without their consent, and, ordinarily, without delaying or preventing the transmission.
Note: An intercept may be an authorized or unauthorized action.
3. The acquisition of… (Read More →)

An operator services call request initiated by the network because of the service condition of the line of the called party (e.g., line out of service, etc. ). [T1.661-1997]

Mutual acceptance and exchange of messages between entities. [After X9.24]

A circuit that facilitates the exchange of data and signaling information between data terminal equipment (DTE) and data circuit-terminating equipment (DCE).
Note: An interchange circuit can carry many types of signals and provide many types of service features, such as control signals, timing signals, and common return functions.