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240 List of terms
553-3001-358/555-4001-135 Standard 02.00 July 2006
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.