Glossary-14
IMACS System Release 5.1.9
Reference Guide
Model No.
Running Head
Meridian Digital Centrex
modem
Contraction of the words “modulator” and “demodulator”
MRD
Manual Ringdown
MSP
Maintenance Service Provider
MTS
Memory Time Switch
MTU
Maximum Transfer Unit
mu-law
T1 companding standard used in the conversion between analog and digital signals in PCM
systems.
NEBE
Near End Block Error. Shows transmission errors detected by the near end equipment
Network card
A CPU card, Resource card, or WAN card used in this system.
NMS
Network management system, a computer used to control networks from a single location.
NNI
Network Node Interface
NOS
No-Signal Alarm
NRZ