Zhone Technologies IMACS-200 - Manual (Page 288)

-14 Glossary
Model No. Running Head
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 port
A CPU port, Resource port, or WAN port 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
Non-Return-to-Zero signal format
NT
Network Termination
NTU
Network Termination Unit, connects BRI station equipment to the integrated access system.
Any standard 2B1Q (U interface) device that supports "nailed-up" (one or two B-channels)
connections with no D-channel signaling.
OCU–DP port
Office Channel Unit - Dataport (one of the data ports for this system).
OOF
Out Of Frame, an indication that the system is searching for the framing bit pattern in the
signal received from the network.
OOS