A service feature that enables the system to complete an access attempt in spite of temporary unavailability of system transmission or switching facilities required to establish the requested access.
Note: Systems that provide calling party camp-on monitor the system facilities until the necessary facilities become available, and then proceed to complete the requested access. Such systems may or may not… (Read More →)

A service feature that permits a terminal either to make outgoing calls or to receive incoming calls, but not both.

Acronym for centralized automatic message accounting.

A combination of camera and video tape recorder in one device.
Note: Camcorders permit easy and rapid photography and recording simultaneously. Camcorders are available in most home video formats: 8mm, Hi-8, VHS, VHS-C, S-VHS, etc. [After Silicon]

See automatic callback, called-party camp-on, queue traffic.

1. A signal that informs a busy telephone user that another call originator is waiting for a connection.
2. A teleprinter exchange facility signal that automatically causes a calling station to retry the call-receiver number after a given interval when the call-receiver teleprinter is occupied or the circuits are busy. Synonym speed-up tone.

A camp-on with the release of the call-originator terminal until the called-receiver terminal becomes free.
Note: The call originator can thus establish other calls until the recall signal is obtained, rather than simply wait until the call-receiver line is available.

Abbreviation for cancel character.

An independent, nongovernment, not-for-profit association for the development, by consensus, of Canadian standards and product certification.

1. A control character used by some conventions to indicate that the data with which it is associated are in error or are to be disregarded.
2. An accuracy control character used to indicate that the data with which it is associated are in error, are to be disregarded, or cannot be represented on a particular device.