Reference Manual

Glossary
MTBCF Mean Time Between Catastrophe Failure
Multidrop Two or more RBSs are connected in a
chain to the same transmission system.
All the relevant time slots are dropped out
by each RBS. (This function is sometimes
called cascading.)
NCS National Colour System
NEBS Network Equipment Building System
NMS Ericsson Network Management System in
DXX
Nominal Power The nominal power is the power level
defined when configuring the transceiver.
N terminal Neutral terminal in an AC mains
connection
NTU Network Terminating Unit
OL/UL Overlaid/Underlaid
O&M Operation and Maintenance
General term for activities such as
configuration, utilization of channels
(frequency bands), cell planning, system
supervision, hardware and software
maintenance, subscriber administration,
and so forth.
OMC Operation and Maintenance Centre
OML Operation and Maintenance Link
Layer 2 communication link for operation
and maintenance services on Abis.
OMT Operation and Maintenance Terminal
The OMT is a terminal that supports
functions for handling the RBS on site.
The terminal can be a portable PC.
Operation Operation is the normal, everyday running
of the RBS with full functions.
OPI OPerational Instructions
OVP OverVoltage Protection
OXU Space for Optional Expansion
P-GSM Primary GSM
PA Power Amplifier
EN/LZT 720 0008 P2A
2001-11-28
479 (485)
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