User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
9
. Issue 1.6. Date3/2/99
Page 1 of 2 © Copyright Airspan Communications Corporation 1999
SECTION 9: GLOSSARY OF TERMS
9: Glossary of Terms
1. Glossary of Terms
1.1. Definitions
AS4000 Trade name for ACC digital radio system
NSE State Functional State /Administrative State (e.g. In Service).
NSE Status Equipment Status (e.g. Alarm.)
Rack Frame for holding multiple electronic shelves, stacked vertically.
Shelf Frame for holding multiple electronic cards, stacked horizontally.
System A conglomeration of sub-systems that together provide a service.
Unit A uniquely identifiable physical module.
V.24 ITU 25 pin D-type interface
X.25 ITU packet switching protocol
2Mbit/s 2.048 Mega bits per second network interface. Divided into 32 x 64
kbit/s channels and used to support a variety of network communication
protocols, depending on the switch involved.
1.2. Acronyms
The following acronyms are used in this document:
AIS Alarm Indication Signal
ALM Alarm
BER Bit Error Ratio
CDMACode Division Multiple Access
CH Channel
Comms Communications
CRU Customer Radio Unit
Ctrl Control
DC Direct Current
DIP Diplexer
DN Directory Number
DP Distribution Point
DRS Digital Radio System
EM Element Manager/ AS8100 (Sitespan)
ENP Equipment Not Present
FA Frame Alignment
FRU Field Replaceable Unit
I/P Input
IS In Service
LED Light Emitting Diode
LNA Low Noise Amplifier