System information

ManualsBrandsAT&T ManualsNetwork RouterDEFINITY Remote Port Security Device

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Glossary

Issue 1 October 1997 GL- 9

coverage path

The sequence of alternate destinations to which a call to a user on a Lucent I

NTUITY system is

automatically sent when it is not answered by the user. This sequence is set up on the switch, nor-

mally with the Lucent I

NTUITY system as the last or only destination.

CPU

See central processing unit (CPU).

cross connect

Distribution-system equipment used to terminate and administer communication circuits.

cross connection

The connection of one wire to another, usually by anchoring each wire to a connecting block and

then placing a third wire between them so that an electrical connection is made.

CSI

See called subscriber information (CSI).

CTS

See clear to send (CTS).

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 Lucent I

NTUITY system opera-

tion.

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 a Lucent I

NTUITY system and

a Lucent switch. The DCIU is a high-speed synchronous data link that communicates with the

common 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 telephone 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 Lucent I

NTUITY system con-

nections. The 2600 or 2700 series may also be used; these support diagnostic testing and the

DATAPHONE II Service network system.

data set

Another term for a modem, although 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

Lucent I

NTUITY system, most terminals, and the switch data link are DTE devices.