Lucent Technologies 8.2 C

DEFINITY ECS Release 8.2

Administrator’s Guide

555-233-506 Issue 1

April 2000

Glossary and abbreviations

1620

BTU

buffer

1. In hardware, a circuit or component that isolates one electrical circuit from another. Typically, a buffer

holds data from one circuit or process until another circuit or process is ready to acc ept the data.

2. In software, an area of memory that is used for temporary storage.

busA multiconductor electrical path used to transfer information over a common connection from any of several

sources to any of several destinations.

business communications terminal (BCT)

A digital data terminal used for business applications. A BCT can function via a data m odule as a special-pur-

pose terminal for services provided by a processor or as a terminal for data entry and retrieval.

BX.25

A version of the CCITT X.25 protocol for data communications. BX. 25 adds a fourth level to the standard

X.25 interface. This uppermost level combines levels 4, 5, and 6 of the ISO reference model.

bypass tie trunks

A 1-way, outgoing tie trunk from a tandem switch to a main switch in an ETN. Bypass tie trunks, provided in

limited quantities, are used as a last-choice route when all trunks to another tandem switch are busy. Bypass

tie trunks are used only if all applicable intertandem trunks are busy.

byte

A sequence of (usually eight) bits processed together.

cabinet

Housing for racks, shelves, or carriers that hold electronic equipment.

cable

Physical connection between two pieces of equipment (for example, data terminal and modem) or between a

piece of equipment and a termination field.

cable connector

A jack (female) or plug (male) on the end of a cable. A cable connector connects wires on a cable to specific

leads on telephone or data equipment.

CACR

CAG

call appearance

1. For the attendant console, six buttons, labeled a–f, used to originate, receive, and hold calls. Two lights next

to the button show the status of the call appearance.

2. For the voice terminal, a button labeled with an extension and used to place outgoing calls, receive incom-

ing calls, or hold calls. Two lights next to the button show the status of the call appearance.

call-control capabilities

Capabilities (Third Party Selective Hold, Thir d Party Reconnect, Third Party Me r g e) that can be used in either

of the Third Party Call Control ASE (cluster) subsets (Call Control and Domain Control).