User Manual

AS4000 Wireless Local Loop
System Overview
GSI 001
605-0000-430
Issue 1.2 Date 7/4/99
Page 15 of 16
Typical management and control functions include:
• Configuration, capacity provisioning and assignment of equipment or circuits
• Performing circuit tests and running diagnostics
• Monitoring alarm events and radio performance
• Installation and commissioning of the AS4000 Central terminal
The AS8300 Element Manager (EM) is designed to offer the necessary functionality to
manage a large AS4000 sub-network and is located in a central operations and maintenance
environment away from the rest of the system. It uses X.25 packet switched data networks
to communicate with the Central Terminals (CTs) within the network.
10 Litespan-120 (LS-120) Channel Bank
If the CT is not located within the Central Office/Telephone Exchange and a 2 Mbit/s link is
not available, then the Analogue (2 Wire, Twisted Pair) Interface is implemented by using a
“Multiplexer” (MUX) or “Channel Bank”. This is added to the AS4000 System to convert
from the CAS type interface standard to the appropriate analogue interface for the customer
in question. (see Figure 12).
The LS-120 channel bank is a small and highly flexible network termination which may be
used as the VF interface for the AS4000 Wireless Fixed Access System to provide customer
service termination. The LS-120 channel bank equipped with basic channel units is used to
connect the AS4000 to the Exchange Switch for POTS services.
The LS120 is capable of providing terminations for a complete AS4000 system for a total of
up to 120 customer terminations.