Reference Manual

Glossary
PCH Paging CHannel
RACH Random Access CHannel
AGCH Access Grant CHannel
CCU Climate Control Unit
CDU Combining and Distribution Unit
CE Conformite´ Europe´enne
Cell An area of radio coverage identified by
the GSM network by means of the cell
identity
CF Central Functions
Channel The common term channel denotes the
virtual connection, consisting of physical
and logical channels between BSS and
MS, during a call in progress.
-> Logical Channel -> Physical Channel
Channel Combination A physical channel on an air interface
carries a defined set of logical channels.
Channel group A channel group is a group of dedicated
logical channels to a specific MS.
CM Control Module (for TMA)
CMD Digital Radio Communication Tester
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.
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 to operate the radio base
station in GSM together with the radio
base station in Total Access
Communication System (TACS) or Nordic
Mobile Telephone system (NMT) on the
same site by sharing common equipment.
EN/LZT 720 0008 R1A
2001-06-26
409 (421)
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