User Manual

AS4000 Wireless Local Loop
System Overview GSI 002
605-0000-430
Issue 1.2 Date 7/4/99
Page 1 of 8 © Copyright Airspan Communications Corporation 1999
AS4000 CENTRAL TERMINAL HARDWARE OVERVIEW.
RF Combiner
Modem Shelf 1
Modem Shelf 2
Modem Shelf 3
Modem Shelf 4
Level Control Unit
AS4000 Central Terminal
CRU
AC-PSU
Type 2/4
NTUs
AC Supply
Subscriber Terminal
ST- V2
AS8100
SiteSpan
Central Office
Typically to 15km
Line of Sight
AS8300 Element
Manager
or
Subscriber Terminal
ST- D128
Junction Box
AC-PSU
Type 1
NTU
AC Supply
Interface
Adapter
CRU
ACC
AS4000
CRU
AC-PSU
Type 2/4
RJ45
AC Supply
Subscriber Terminal
ST- I1
Figure 13. Main Elements of the AS4000 System
The CT is normally located in the Central Office premises (typically a local exchange) and
provides access to the network equipment, on one side, and access to the radio paths on the
other. A ST is located at the customer’s premise where each ST installation supports:
• two, independent analogue connections (for telephones, facsimile, etc.).
or
• One G703 interface providing two 64 kbit/s Channels.
• One ISDN I420 ‘S’ Interface 2B+D.
Each CT is served by a radio link that operates in the 2 GHz to 2.3 GHz range (C1 to C3),
the 2.3 GHz to 2.5 GHz range (S1+S3) or the 3.4 to 3.6Ghz range (X1 to X3).
Control of the AS4000 System is vested in a control system, Sitespan, which can be co-
located with the CT equipment, or remotely located at a Network Administration Centre.