Glossary
GSM defines two major categories of
logical channels:
TCHs Traffic CHannels, for speech or
user data
CCHs Control CHannels, for control
signalling.
-> Physical Channel -> Channel
Combination
Logical RU A unit which can be referred to, but is not
a single physical unit. There are three
different kinds of logical RUs:
1. Buses
2. Antennas
3. Environment
LOS Loss Of Signal
LVF Low Voltage Filter
MADT Mean accumulated downtime
Main RU A main replaceable unit is a replaceable
unit that contains one or more processors,
to which software can be downloaded
from the BSC.
MHS Modification Handling System
Ericsson trouble report database
MMI Man-Machine Interface
MO Managed Object
MRT Mean repair time
MS Mobile Station
MTBF Mean Time Between Failure
MTBCF Mean Time Between Catastrophe Failure
NCS National Colour System
NMS Ericsson Network Management System in
DXX
Nominal Power The nominal power is the power level
defined when configuring the transceiver.
O&M Operation and Maintenance
302 (306)
EN/LZT 123 2697 R5A
1998-08-13
© Ericsson Radio Systems AB
— All Rights Reserved —
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