Glossary

D

database

A structured set of files, records, or tables. Also, a collection of filesystems and files in disk mem- ory that store the voice and nonvoice (program data) necessary for INTUITY system operation.

data communications equipment (DCE)

Standard type of data interface normally used to connect to data terminal equipment (DTE) devices. DCE devices include the data service unit (DSU), the isolating data interface (IDI), and the modular processor data module (MPDM).

data communications interface unit (DCIU)

A switch device that allows nonvoice (data) communication between an INTUITY system and an AT&T switch. The DCIU is a high-speed synchronous data link that communicates with the com- mon control switch processor over a direct memory access (DMA) channel that reads data directly from FP memory.

data link

A term used to describe the communications link used for data transmission from a source to a destination. For example, a phone line for data transmission.

data service unit (DSU)

A device used to access digital data channels. DATAPHONE II 2500 DSUs are synchronous data communications equipment (DCE) devices used for extended-local INTUITY system connections. The 2600 or 2700 series may also be used; these are more expensive DSU options and support diagnostic testing and the DATAPHONE II Service network system.

data set

AT&T term for a modem. A data set usually includes the telephone. See also modem.

data terminal equipment (DTE)

Standard type of data interface normally used for the endpoints in a connection. Normally the INTUITY system, most terminals, and the switch data link are DTE devices.

data terminal ready (DTR)

A control signal sent from the data terminal equipment (DTE) to the data communications equip- ment (DCE) that indicates the DTE is on and ready to communicate.

DBP

See data base processor.

DCE

See data communications equipment.

DCIU

See data communications interface unit.

DCP

See digital communications protocol.

DCS

See distributed communications system.

debug

See troubleshoot.

Issue 2 December 1995 GL-7

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Image 147
AT&T 2400 Database, Data communications equipment DCE, Data communications interface unit Dciu, Data link, Data set, Debug