User's Manual Part 3

RBS 2109 User’s Guide
10 Glossary
This glossary lists abbrevi
ations and acronyms used in texts dealing with RBS
2000 cabinets. Some basic te
rms and acronyms needed for cross-reference
are included in the list.
Terms and Abbreviations
An arrow ⇒ is used to indic
ate a reference to another entry in the 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 the BSC and the BTS.
AC
Alternating Current
ACB
Alarm Collection Board
ACCU
Alternating Current Connection Unit
ACCU-CU
ACCU Connection Unit
ACCU-DU
ACCU Distribution Unit
A/D converter
Analog to Digital converter
AFS
AMR Full-rate speech
AGW
Abis Gateway
AHR
AMR Half-rate speech
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
221EN/LZT 720 0090 Uen R1A 2004-09-17