User Manual

AS4000 Subscriber Terminal
Installation and Commissioning
IXL 001
605-0000-454
Draft Issue 1.3 Date 8/02/00
Page 8 of 10
Abbreviations
ADPCM Adaptive Differential Pulse Code Modulation
AC Access Concentrator
AGC Automatic Gain Control
CCC Call Control Channel
CDMA Code Division Multiple Access
CPE Customer Premises Equipment
CRU Customer Radio Unit
CU Compression Unit
CT Central Terminal
CTU Central terminal Tributary Unit (at AC site)
DA Demand assignment
DC Direct Current
DMM Digital Multi Meter
DRS Digital Radio System
DTU Demand Assignment Tributary Unit
FA Fixed Assignment
ISDN Integrated Services Digital Network
ITU-T International Telecommunications Union –Telecommunications
LAC Link Acquisition Channel
LD Loop Disconnect
MF Multi-Frequency
MU Modular Unit (ST)
NTU Network Termination Unit
PC Power Control
PCM Pulse Code Modulation
PSU Power Supply Unit
PTC Priority Traffic Channels
RF Radio Frequency
RU Residential Unit (ST)
SC Shelf Controller
SIU Service Interface Unit
ST Subscriber Terminal
SU Sub Unit (ST)
Rx Receive
Tx Transmit
TDM Time Division Multiple Access
TCH Traffic Channels
TU Tributary Unit
VDU Video Display Unit
VF Voice Frequency
XTU Switch Tributary Unit