Reference Manual

Glossary
59 Glossary
This glossary lists abbreviations and acronyms used in texts dealing
with RBS 2000 cabinets. Some basic terms and acronyms needed for
cross-reference are included in the list.
Terms and Abbreviations
An arrow ⇒ is used to indicate a reference to another entry in this list.
1–P One-Pair connection with echo
cancellation (= two wires)
2–P Two-Pair connection with echo
cancellation (= four wires)
AAU Active Antenna Unit
Abis GSM interface standard defining attributes
of the communication between BSC and
BTS
AC Alternating Current
ACB Alarm Collection Board
ACCU Alternating Current Connection Unit
A/D converter Analog to Digital converter
AGW Abis Gateway
Air conditioner One version of the climate unit (Active
cooler)
AIS Alarm Indication Signal
ALBO Automatic Line Build Out
ALNA Antenna Low Noise Amplifier
ALPU Antenna Lightning Protection Unit
AO Application Object
ARAE Antenna Related Auxiliary Equipment
ARFCN Absolute Radio Frequency Channel
Number
ARP Antenna Reference Point
ARU Active Replaceable Unit
ASIC Application Specific Integrated Circuit
Astra ASIC in the TRU
ASU Antenna Sharing Unit
EN/LZT 720 0008 P2A
2001-11-28
469 (485)
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