User Manual

AS4000 Wireless Local Loop
System Overview
GSI 001
605-0000-430
Issue 1.2 Date 7/4/99
Page 4 of 16
• Mixed rate voice (compressed), data and video equipment
• Global System for Mobile Communications (GSM) base stations in microcells
These applications require the use of dedicated fixed links, with 64 kbit/s data rates, and bit
error rates (RBER=1x10
-7
or better).
5.1 Applications of the ST-D128
The equipment to be connected to the ST-D128 is CPE equipment designed to support the
private or virtual private networks of business customers. The CPE equipment supports a
variety of data, voice and image applications where traditional analogue or low speed
(<9,600 kbit/s) digital services are inadequate. Additionally, there are a number of
specialised applications, such as the support of microcell base stations, that can be served by
the ST-D128.
5.2 Using Interface Converters
Products that are not designed for using the E1 interface can be connected to the system
using an interface converter that provides either 2 x 64 kbit/s X.21 or V.35 interfaces. The
host can also be interfaced using an interface connector if needed. The Converter plugs into
the Network Terminating and Test Point (NTTP) equipped with a RJ45 Socket.
5.3 Statistical Multiplexer (StatMux) Applications
The D128 using a statmux can support asynchronous communications from a remote site to
a host site This allows for a number of remote terminals/PCs to simultaneously access a
Host Computer.
5.4 Multiplexer Networks
The D128 can support multiple network platforms using Time Division Multiplexers (TDM)
to cater for compressed voice and video and synchronous communications.