AT&T DS1/DMi/ISDN-PRI manual Data transmission, Tandem, GL-2GLOSSARY

GL-2GLOSSARY

analog

analog/digital- facility test circuit (ADFTC)

arithmetic logic unit (ALU)

asynchronous data transmission

AT&T ISDN basic rate interface (BRI)

AT&T ISDN primary rate interface (ISDN-PRI)

AT&T standardized facility element

Automatic

Alternate

Routing (AAR)

automatic identified outward dialing (AIOD)

automatic number identification (ANI)

Automatic Route Selection (ARS)

AUTOVON (Automatic Voice Network)

AUTOVON access

The representation of information by means of continuously variable physical quantities such as amplitude, frequency, phase, or resistance.

Amaintenance circuit resident in communications-system processor port carriers for use in testing the hardware associated with modem pooling.

The area in a central processor that performs arithmetic and logic functions.

A method of transmitting data in which each character is preceded by a start bit and followed by a stop bit, thus permitting data characters to be transmitted at irregular intervals. Also called asynchronous transmission. See also synchronous

data transmission.

An AT&T implementation of the CCITT specification that describes the level 1, level 2, and level 3 interfaces for ISDN-BRIs on AT&T products. See also AT&T ISDN primary rate interface and ISDN basic rate interface.

An AT&T implementation of the CCITT specification that describes level 1, level 2, and level 3 interfaces for ISDN-PRIs on AT&T products. See also AT&T ISDN basic rate interface and ISDN primary rate interface.

A codeset-6 information element (IE) used to indicate which of the AT&T standardized services or facilities is being requested or responded to. The ASF element also specifies the kind of control associated with the facility. See also

codeset.

A feature that provides optimum routing for private-network calls by selecting, in descending order of desirability, the best route available.

An arrangement whereby a communications system can provide automatic number identification (ANI) data to a class-5 serving office to allow billing of central-office (CO) trunk calls to individual system extensions. An AIOD data link connects the class-5 serving office and the communications system that is used by the CO to query the system for billing data.

The process of automatically identifying the calling party’s billing number and transmitting that number from the caller’s local central office (CO) to another point on or off the public network. The term ANI is sometimes used for the billing number itself as well as for the process of identifying and transmitting that number. See also ISDN SID-ANI.

A feature that provides optimum routing for public-network calls by selecting, in descending order of desirability, the best route available. See also high-volume

tandem.

The U.S. Department of Defense private voice network. See also AUTOVON

access.

The capability of a communications system to interface with special military voice circuits on the AUTOVON. See also AUTOVON.