ioWave ioLink 4 User manual

02/99 PRELIMINARY
.
User Guide
Technical Reference
for
ioLink 4
Wireless System
1010 Wisconsin Avenue •NW •Suite 250 •Washington, DC 20007
Telephone: [phone] •Facsimile: [phone] •http://www.iowave.com
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ioLink 4
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02/99 PRELIMINARY
Welcome
We welcome you to the world of Wireless Communications. To familiarize you with the
ioLink 4 and help you get the most out of the system, please review the enclosed
information and keep it for your reference. You will find:
1. Quick Start Installation Guide booklet to provide you with an overview of the system,
installation instructions, and troubleshooting tips.
2. This User Technical Reference Guide that contains in depth information on how to use
the system. It is designed for system managers, telecommunications engineers and
electrical engineers those involved in hands on operation, troubleshooting, and
monitoring of communications systems.
Please be sure to read the section entitled “Important Information Regarding Your ioLink 4
Wireless System” which appears in Appendix C.
We value your investment in our system and encourage you to call us with your comments
and suggestions. We look forward to serving you.
Copyright 1999 by ioWave, Inc. All rights reserved. No part of thismanual may be reproduced without express written consent from
ioWave. The information contained in this manual issubject to change without notice.

PRELIMINARY
Customer Support [phone] ii
Welcome i
Table of Contents ii
Table of Figures iv
Table of Tables v
SECTION 1 ioLink 4 PRODUCT DESCRIPTION 1-1
1.1 Key Features and Benefits 1-1
1.2 Advanced Features 1-2
1.2.1 Performance Monitoring 1-2
1.2.2 Forward Error Correction Alert 1-3
1.3 How to Contact Us 1-3
SECTION 2 ioLink 4 SYSTEM COMPONENTS 2-1
2.1 Modem (Indoor) Unit Description 2-1
2.2 Intermediate Frequency Cable 2-2
2.3 RF (Outdoor) Unit Description 2-3
2.4 Radio Frequency Cable 2-4
2.5 Antenna Description 2-5
2.6 Antenna Selection and Consideration 2-5
2.6.1 Size 2-5
2.6.2 Polarization 2-6
2.7 Typical Link Setup 2-7
2.7.1 Normal Operation 2-8
2.7.2 LCD Screen Cycling 2-8
2.8 Advanced Features 2-8
2.8.1 Performance Monitoring 2-9
2.8.2 Forward Error Correction 2-9
2.8.3 Diagnostic Testing 2-13
SECTION 3 OPERATING THE ioLink 4 3-1
3.1 Front Panel Interactions 3-1
3.1.1 LED Indicators 3-2
3.1.2 Keypad and LCD 3-2
3.1.3 ioLink 4 LCD Menus 3-3
3.1.3.1 STATUS Menu Item Descriptions 3-4
3.1.3.2 CONFIGURATION Menu Item Descriptions 3-5
3.1.3.3 TEST Menu Item Descriptions 3-6
3.1.3.4 ALARM Menu Item Descriptions 3-8
3.1.3.5 ADVANCED Menu Item Descriptions 3-10
3.1.4 Remote Control (CONSOLE) Connection 3-12
3.1.5 E1/G.703 Interface 3-12
3.1.6 T1 Interface 3-13
3.1.7 Pin Outs for Front Panel Connectors 3-13
Table of Contents
Table of Contents

PRELIMINARY
Customer Support [phone] iii
Continued
3.2 Rear Panel Interactions 3-14
3.2.1 Power Connector 3-14
3.2.2 Alarm Fault Connector 3-15
3.2.3 RF Interface Connectors 3-15
3.2.4 Pin Outs for Rear Panel Alarm Terminal Block 3-15
SECTION 4 NETWORK MANAGEMENT FOR ioLink 4 4-1
4.1 Functionality 4-1
4.2 Configuration 4-2
4.3 Test Modes 4-3
4.4 Performance Monitoring 4-4
4.5 Error/Alarm Monitoring 4-5
4.5.1 Near-end Related Alarms 4-5
4.5.2 RF or Far-end Related Alarms 4-5
SECTION 5 TROUBLESHOOTING ALARM CONDITIONS FOR ioLink 4 5-1
5.1 Transmit LOS 5-1
5.2 LIU Not Responding 5-1
5.3 Firmware Not Responding 5-1
5.4 FEC BER > x.x E-x 5-2
5.5 FEC Decoder Not Locked 5-2
5.6 RX Low Signal Power 5-3
5.7 RX Low Symbol Power 5-3
5.8 No Acquisition 5-5
5.9 Alarm Indication System (AIS) 5-5
APPENDIX A TECHNICAL SPECIFICATIONS FOR ioLink 4 A-1
APPENDIX B GLOSSARY OF TERMS B-1
APPENDIX C IMPORTANT INFORMATION ABOUT YOUR SYSTEM C-1
C.1 FCC Regulatory Notice C-1
C.2 Warranty C-1
C.3 Disclaimer C-3
C.4 Use of ioWave Products Outside of the United States C-3

PRELIMINARY
Customer Support [phone] iv
Figure 1-1. Typical Link Setup 1-2
Figure 2-1. Modem Unit Front Panel 2-1
Figure 2-2. Modem Unit Rear Panel 2-1
Figure 2-3. RF Unit Connections 2-3
Figure 2-4. RF Unit Block Diagram 2-4
Figure 2-5. Typical Link Diagram 2-5
Figure 2-6. LCD Screen Cycling 2-8
Figure 2-7. Forward Error Correction (FEC) Improvement of Bit Error Rate (BER)
for Differential Quadrature Phase Shift Keying (DQPSK) 2-12
Figure 3-1. Modem Unit Front Panel 3-1
Figure 3-2. Full Loopback 3-6
Figure 3-3. Far-end Loopback 3-3
Figure 3-4. Source Loopback 3-4
Figure 3-5. FEC Loopback 3-11
Figure 3-6. LIU Loopback (Local) 3-11
Figure 3-7. LIU Loopback (Remote) 3-12
Figure 3-8. DSX-1 (RJ-48C – female) Pin Assignments 3-13
Figure 3-9. Modem Unit Back Panel 3-14
Figure 3-10. Terminal Block (Form-C contacts) Pin Assignments 3-15
Figure 5-1. Received Signal Strength Indicator (RSSI) Voltage Conversion 5-4
Table of Figures

PRELIMINARY
Customer Support [phone] v
Table 3-1. Light Emitting Diode (LED) Indicators 3-2
Table 3-2. Liquid Crystal Display (LCD) Menu Defaults 3-3
Table 3-3. Status Menu Items 3-4
Table 3-4. Configuration Menu Parameters 3-5
Table 3-5. Alarm Menu Conditions 3-8
Table 3-6. Advanced Menu Options 3-10
Table A-1. Technical Specifications for ioLink 4 A-1
Table of Tables

PRELIMINARY
Customer Support [phone] 1-1
The ioLink 4 provides four full-duplex Direct Sequence Spread Spectrum (DSSS) devices for T1/E1 rate
wireless communications between two line of sight (LOS) locations. It can be connected to many types of
interfaces to meet various communication needs. The technologies incorporated in the ioLink 4 give you
an efficient, minimal interference, error-resistant link compare to other services, and a superior carrier-to-
interference (C/I) performance ratio.
1.1 Key Features and Benefits
The ioLink 4 system provides many important features and benefits:
•Offers quick turnaround on investment and savings versus recurring leased line charges
•Does not require user licensing (complies with FCC regulation Part 15)
•Provides clear and robust communications over a range of distances
•Is capable of voice, video, and data transmissions
•Operates in the precertified 2.4 −2.4835 GHz and 5.725 −5.850 GHz ranges which are virtually
immune to atmospheric interference such as rain or snow
•Provides four full duplex T1 (1.544 Mbps) or E1 (2.048 Mbps) capacity with DSX-1 or G.703
interfaces, respectively
•Provides forward error correction (FEC) rate-½for E1 and rate- ¾for T1 for advance
warning of potential errors in communication, and alerts the user of changes in the environment
that may not have been present during installation which could impact the transmission path
•Is fully compliant with the simple network management protocol (SNMP)
•Provides configuration management via the front panel or a Personal Computer.
A schematic of an ioLink 4 installation appears on the next page.
SECTION 1 ioLink 4 PRODUCT DESCRIPTION

User Guide: Technical Reference SECTION 1 ioLink 4 PRODUCT DESCRIPTION
PRELIMINARY
Customer Support [phone] 1-2
IF Cable
(
LINE OF SIGHT LINK
)
Antenna
2 ft. to 8 ft. Diameter
IF Cable
User
Equipment
Full-Duplex
Spread Spectrum
Communication Link
RF Unit RF Unit
RF Cable RF Cable
Modem
Unit Modem
Unit
One communications link consists of one ioLink 4 terminal (RF Unit, Modem Unit, Antenna, and Cables)
installed at each end of the line-of-sight link. The ioLink4 link provides four E1 or T1 connections.
1.2 Advanced Features
The ioLink 4 system includes several unique features:
•Performance monitoring
•Diagnostic testing
•Ability to place multiple links in the same area without interference.
These advanced features allow the user to keep the link up and running with little effort while giving the
user a powerful set of diagnostics and statistics to detect or troubleshoot potential problems.
1.2.1 Performance Monitoring
Performance monitoring is an important quality control tool. The various statistics the user can obtain
from the front panel menus or via a PC can inform how the system is performing. Even though the link is
functioning properly, the ability to keep track of link performance allows the user to see changes in the
link, which may degrade communications over time.
The ioLink 4 wireless system is fully compliant with the simple network management protocol (SNMP)
and provides the user with a performance monitoring system. The system allows the user or system
Figure 1-1. Typical Link Setup
Destination
User
Source