Glossary
CMRU Central Main Replaceable Unit. Main RU.
The RBS is physically connected to the
Base Station Controller (BSC) via the
CMRU. There is only one CMRU in each
RBS.
CMS 40 Cellular Mobile System
Ericsson digital land mobile
telecommunication system based on the
Joint Technical Committee (JTC)
specification for PCS 1900.
CPU Central Processing Unit
CSA Canadian Standards Association
CSES Consecutive Severely Errored Second
CSU Customer Service Unit
Dannie ASIC in the TRU
DB DataBase
DC Direct Current
DCC Digital Cross Connector
DCS Digital Communication System
International standard for 1800 MHz
based on the GSM standard.
DIP DIgital Path
The name of the function used for
supervision of the connected PCM lines.
Dixie ASIC in the TRU
DM Degraded Minute
DM Differential Mode
DMRU Distributed Main Replaceable Unit.
If a Main RU is subordinated to the
CMRU, it is said to be distributed.
Downlink Signalling direction, from the system to
the MS.
DP Distribution Panel
DS1 Digital Signal Level 1 (1544 kbit/s)
DSP Digital Signal Processor
EN/LZT 123 2697 R5A
1998-08-13
299 (306)
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— All Rights Reserved —
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