User Manual

AS4000 Wireless Local Loop
System Overview
IXL 001
605-0000-430
Issue 1.2 Date 7/4/99
Page 6 of 8
PSU Power Supply Unit
RF Radio Frequency
REN Ringer Equivalence Number
Rx Receive
SC Shelf Controller
SPM Subscriber Pulse Metering
SS Spread Spectrum
SVC Switched Virtual Circuit
TE1/2 Terminating Equipment (ISDN)
TU Tributary Unit
Tx Transmit
VF Voice Frequency
Terms
AS4000 Trade name for ACC Wireless Fixed Access System.
Assembly A conglomeration of sub-assemblies.
A Subscriber The customer who initiates the telephone call.
Board An electronic module based on a PCB.
B Subscriber The customer who receives the telephone call.
Card An electronic module that fits in a shelf.
dBm Decibels relative to 1 milli-watt.
dBr Decibels relative to the network PCM level.
Downlink The communication channel from the Central Terminal (CT) to the
Subscriber Terminal (ST).
kPa Kilo Pascals.
Local Loop The local loop is the connection between the subscriber CPE equipment
and the network. It is termed “local loop” because wired POT services
are provided when the CPE equipment “loops”, ie connects, the 2 wires
of the copper pair from the network together.
Line Generator The circuitry that drives the VF line for use by the CPE.
Module A hardware or software building block of a system or sub-system.
Normal Line Feed This is a state in which the VF line generator circuitry provides the
"normal" operational power feed to the line, as appropriate for CPE in
"Off-hook" or "On-hook" states.
Off-hook The VF line is looped by the CPE (call).
Operational Life The period over which the system is designed to remain operational
under normal operating conditions.
On-hook The VF line is open circuit at CPE (no call).
Rack Frame for holding multiple electronic shelves, stacked vertically.
Shelf Frame for holding multiple electronic cards, stacked horizontally.