Справочник Пользователя для Lucent Technologies Definity Enterprise Communication Server 8.2
DEFINITY ECS Release 8.2
Administrator’s Guide
Administrator’s Guide
555-233-506
Issue 1
April 2000
Glossary and abbreviations
1645
MSS
Mass storage system
MSSNET
Mass storage/network control
MT
Management terminal
MTDM
Modular trunk data module
MTP
Maintenance tape processor
MTT
Multitasking terminal
multiappearance voice terminal
A terminal equipped with several call-appearance buttons for the same extension, allowing the user to handle
more than one call on that same extension at the same time.
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.
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
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
Message-waiting lamp
N
N+1
Method of determining redundant backup requirements. Example: if four rectifier modules are required for a
DC-powered single-carrier cabinet, a fifth rectifier module is installed for backup.
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.
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.