Glossary:

ATIS Telecom Glossary

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dHTML

Abbreviation for dynamic Hypertext Markup Language. A form of HTML used to create Web-page content that, as perceived by the viewer, appears to change each time it is viewed, without further interaction with the server.
Note: The Web-page content may use any of several technologies including CGI (computer graphics interface) scripts.

Di Group

A basic group of Pulse Code Modulation (PCM) channels assembled by Time Division Multiplex. In the United States it usually consists of 24 channels at
1. 544 Mbs.

diagnostic program

1. A program used to investigate the cause or the nature of conditions or problems within specified elements of a system.
2. A computer program that detects, locates, or identifies a fault in equipment, an error in input data, or an error in a computer program.

dial mode

Operation of data circuit-terminating equipment (DCE) so that circuitry, such as data terminal equipment (DTE), associated with call origination is directly connected to a communications channel.

dial pulse

A dc pulse produced by an end instrument that interrupts a steady current at a sequence and rate determined by the selected digit and the operating characteristics of the instrument.

dial pulsing

Pulsing in which a direct-current pulse train is produced by interrupting a steady signal according to a fixed or formatted code for each digit and at a standard pulse repetition rate.
Note: Dial pulsing originated with rotary mechanical devices integrated into telephone instruments, for the purpose of signaling. Subsequent applications use electronic circuits to generate dial pulses. Synonym pulsing.

dial service assistance (DSA)

A network-provided service feature, associated with the switching center equipment, in which services, such as directory assistance, call interception, random conferencing, and precedence calling assistance, are rendered by an attendant.

dial signaling

Signaling in which dual tone multifrequency (DTMF) signals or pulse trains are transmitted to a switching center.
Note 1: Rotary dials produce pulse trains. Keypads may produce either DTMF signals or pulse trains.
Note 2: Dial signaling traditionally refers to pulse trains only.

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