Manual Part 7
RBS 2000 Glossary
CEU
Coverage Extension Unit
CF
Central Functions
channel
The common term channel denotes the virtual
connection, consisting of physical and logical channels,
between BS
S and MS, during a call in progress.
⇒ Logical Channel ⇒ Physical Channel
Channel
Combination
A physical channel on an air interface carrying a defined
set of logical channels.
Channel group
A channel group is a group of dedicated logical
channels to a specific MS.
CM
Macro = Control Modul
e (for TMA)
Micro = Common Mode
CMD
Digital Radio Communication Tester
CMRU
Central Main Replaceable Unit.
The RBS is physically connected to the Base Station
Controller (BSC) via the CMRU. There is only one
CMRU in each RBS.
Macro: CMRU = DXU
Micro: CMRU = The whole RBS
CNU
Combining Network Unit
Compr
Compressor
CON
LAPD concentrator
LAPD concentration is used to reduce the number of
required physical links between the BSC and BTS.
Config
Configuration
Co-siting
Co-siting is the operation of radio equipment from more
than one mobile telephone system and/or frequency on
the same site sharing common equipment.
CPI
Communication and Power Interface
CPI
Customer Product Information
7 (24)
EN/LZT 720 0283 Uen R1B