Lucent Technologies 8.2 N

DEFINITY ECS Release 8.2

Administrator’s Guide

555-233-506 Issue 1

April 2000

Glossary and abbreviations

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MSS

MSSNET

MTManag ement terminal

MTDM

MTP

MTT

multiappearance voice terminal

A terminal equipped with several call-appearance buttons for the same extension, allowing the user to hand le

more than one call on that same extension at the same time.

Multicarrier cabinet

A structure that holds one to five carriers. See also single-carrier cabinet.

Multifrequency Compelled (MFC) Release 2 (R2) signaling

A signal consisting of two frequency components, such that when a signal is transmitted from a switch,

another signal acknowledging the transmitted signal is received by the switch. R2 designates signaling used in

the United States and in countries outside the United States.

multiplexer

A device used to combine a number of individual channels into a single common bit stream for transmission.

multiplexing

A process whereby a transmission facility is divided into two or more channels, either by splitting the fre-

quency band into a number of narrower bands or by dividing the transmission channel into successive time

slots. See also time-division multiplexing (TDM).

multirate

The new N x DS0 service (see N x DS0).

MWL

N+1

Method of determining redundant backup requirements. Exa mple: if four rectifier modules are required for a

DC-powered single-carrier cabinet, a fifth rectifier module is installed for backup.

N x DS0

N x DS0, equivalently referred to as N x 64 kbps, is an emerging standard for wideband calls separate from

H0, H11, and H12 ISDN channels. The emerging N x DS0 ISDN multirate circuit mode bearer service will

provide circuit-switched calls with data-rate multiples of 64 kbps up to 1536 kbps on a T1 facility or up to

1920 kbps on an E1 facility. In the switch, N x DS0 channels will range up to 1984 kbps using NFAS E1 inter-

faces.