Reference Manual

Glossary
AT Alphanumeric Terminal
ATRU Adaptive Transceiver Unit
ATSR Air Time Slot Resource
AU Antenna Unit
GSM 900 = CEU + Passive Antenna
GSM 1800/1900 = AAU
BALUN BALance and UNbalance transformer
Batt Battery
BB Battery Box
BBS Battery Back-up Stand
BCCH Broadcast Control CHannel
Downlink only broadcast channel for
broadcast of general information at a base
station, on a base station basis.
BCS Block Check Sequence
BDM Battery Distribution Module
The BDM is an IDM with a battery and a
local processor.
BER Bit Error Rate
BFU Battery Fuse Unit
Bias injector Injects DC power in the coaxial cable to
feed the TMA. Isolates the DC power
from the RF signal fed to the CDU.
Bm Denotes a full rate traffic channel
BPC Basic Physical Channel
Denotes the air interface transport vehicle
formed by repetition of one time slot on
one or more radio frequency channels.
BS Base Station
BSC Base Station Controller
GSM network node for control of one or
more BTSs.
BSCSim Base Station Controller Simulator
BSS Base Station System
470 (485)
EN/LZT 720 0008 P2A
2001-11-28
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Preliminary