Nortel Networks 555-4001-135 User Manual

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

Pulse Code Modulation. 

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.

Return To Service. 

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

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.

Secondary Directory Number. 

Simple Mail Transfer Protocol. 

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

Terminal Number (CS 1000 equivalent of LEN).

See Telephone User Interface.

File format used for storing voice files created under Microsoft 
Windows.