NEC 2400, Integration Manual

Page: 147 / 168

Glossary
Issue 2 December 1995
GL-7
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.