AT&T 2500 series, 7500 series, 7100 series Dciu link, Dcp Dcs, DCS cluster DCS node, See bit rate

GL-8GLOSSARY

____________________________________________________________________________________________________________________________

_

data communications interface unit (DCIU)

data module

data path

data protection

data rate

data service unit (DSU)

data signal level 1 (DS1)

data terminal

data terminal equipment (DTE)

DCIU

DCIU link

DCP

DCS

DCS cluster

DCS node

An interface between the System 85 main processor (501CC) and AUDIX equipment, or (in a DCS configuration) other switches. The DCIU consists of four circuit packs in the System 85 and Generic 2 common control carrier. System 75 and Generic 1 has a switched communication interface (SCI) or processor interface (PI) to provide similar functionality.

A device that interfaces customer-provided data equipment with the communications system via DCP or BRI protocols.

The end-to-end connection used for a data-communications link.

A feature that prevents intrusions into data transmissions by using bridge- on features, such as Call Waiting, Override, and Busy Verification of Lines. The bridge-on features, if allowed, would disrupt a data transmission by inserting a warning tone into the connection. Two forms of Data Protection are available: temporary and permanent. Temporary data protection is activated with an access code and permanent data protection is assigned to a line class of service (COS).

See bit rate.

A device designed to transmit digital data on transmission facilities. See also network channel-terminating equipment.

A 1.544 Mbps transmission facility.

An I/O device that has either switched or direct access to a host computer.

The equipment that makes up the endpoints in a connection over a data circuit.

See data communications interface unit.

A hardware communications link that connects two data-communications interface units (DCIUs).

See digital communications protocol.

See distributed communications system.

Two or more communications systems interconnected by data communications interface units (DCIUs) or switch communications/processor interfaces (SCIs/PIs) and using distributed communications system (DCS) software to provide transparency for a limited set of station/attendant features. See also DCS Centralized AUDIX, DCS endpoint, and DCS node.

A communications system within a distributed communications system (DCS) cluster. See also DCS cluster.