RWIU System Installation
RWIU Additional Information
64
Strata AirLink Installation Guide 5/00
Ring Back Tones Generator
The RWIU PCB incorporates a 32KB EPROM that generates:
♦
440 Hz ring back tone, modulated at 480 Hz
♦
2400 Hz busy override tone
♦
4 tone channels for the U.S.
Each tone generates 800 bytes every 125 ms. The bytes are sent on a specific time slot of the
matrix and to the related time slot of the PHIN output.
Serial Line Interface
There is a six-pin serial line interface (J7) that debugs and sets up the system. It is a RS-232 port
and connects the PC to the RWIU (see
Table 21
).
Software Architecture
The RWIU software is a real-time embedded software, written in C language designed for the Intel
80186EC processor. Its modules include real-time tasks, service packages, and hardware drivers.
Its functions are:
♦
Communication (KSU DHWY and Base Station)
♦
Local debugging
♦
Monitor communication
♦
Call control logic procedures (call origination, delivery and release)
♦
Mobility control (handoff)
♦
Handset text and icon displays
♦
System and Base Station power up controls
♦
RWIU cross connects
♦
Base Station software download
♦
Start-up diagnostics (BIT)
♦
Online diagnostics
♦
Loop tests
♦
System audit and parameter refresh
♦
RWIU and Base Station configuration
♦
Alarm reports and LEDs
Table 21
Connector J7 Descriptions
Pin No.
Name
Description
1
TXD
RS-232 TX data (from the RWIU)
2
RTS_0
RS-232 RTS data (from the RWIU)
3
RXD
RS-232 RX data (to the RWIU)
4
CTS_1
RS-232 CTS data (from the RWIU)
5
Not used
6
GND
RS-232 Ground (from the RWIU)
Summary of Contents for Strata AirLink
Page 6: ...Contents Chapter 5 Maintenance and Troubleshooting iv Strata AirLink Installation Guide 5 00 ...
Page 10: ...Introduction Related Documents Media viii Strata AirLink Installation Guide 5 00 ...
Page 28: ...Pre installation Step 10 Mount Base Stations 18 Strata AirLink Installation Guide 5 00 ...
Page 106: ...Maintenance and Troubleshooting Troubleshooting 96 Strata AirLink Installation Guide 5 00 ...