240 List of terms

PBX

Private Branch Exchange. A telephony switch that is privately owned.

PCM

Pulse Code Modulation.

PCMCIA

Personal Computer Memory Card International Association. This organization has defined a credit card sized plug-in board for use in PCs. These cards are the only way to get to a laptop bus without using a docking station. In addition, application software can be stored on the card into system address space so that the software can run directly from the card, resulting in a faster start and less memory required from the host computer.

RTS

Return To Service.

SCSI

Small Computer System Interface. A device that enables computers to cable-connect to networks or external tape units/hard drives.

SDI

Serial Data Interface. For some Meridian switches, provides ports between the CPU and external devices such as a teletype or maintenance telephone. More generally, an SDI is a mechanism for changing the parallel arrangement of data within computers to the serial form used on transmission lines and vice versa.

SDN

Secondary Directory Number.

SMTP

Simple Mail Transfer Protocol.

Telephone User Interface

An interface that allows the scheduling of simple conferences over a DTMF telephone.

TN

Terminal Number (CS 1000 equivalent of LEN).

TUI

See Telephone User Interface.

.WAV

File format used for storing voice files created under Microsoft

Windows.

553-3001-358/555-4001-135 Standard 02.00 July 2006

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Nortel Networks 553-3001-358, 555-4001-135 manual Pbx