User's Manual
Table Of Contents
- Preface
- Overview
- Installation and Initialization
- Basic Configuration
- Advanced Configuration
- 4.1 System Configuration
- 4.2 Network Configuration
- 4.3 Ethernet Properties Configuration
- 4.4 Wireless Configuration
- 4.5 Security Configuration
- 4.6 Quality of Service (QoS) Configuration
- 4.7 VLAN Configuration (Bridge Mode only)
- 4.8 Filtering Configuration (Bridge Only)
- 4.9 DHCP Configuration
- 4.10 IGMP Snooping (Bridge Mode only)
- 4.11 Routing Features Configuration
- System Management
- Monitoring the System
- Procedures
- 7.1 TFTP Server Setup
- 7.2 Web Interface Firmware Download
- 7.3 Configuration Backup
- 7.4 Configuration Restore
- 7.5 Text Based Configuration (TBC) File Management
- 7.6 Soft Reset to Factory Default
- 7.7 Hard Reset to Factory Default
- 7.8 Forced Reload
- 7.9 Upgrade a New Firmware Using ScanTool in Bootloader Mode
- 7.10 Download a New Firmware Using CLI from Bootloader
- Troubleshooting
- 8.1 PoE Injector
- 8.2 Connectivity Issues
- 8.3 Communication Issues
- 8.4 Setup and Configuration Issues
- 8.4.1 Lost Password
- 8.4.2 The QB-8100 Responds Slowly
- 8.4.3 Device Has Incorrect IP Address
- 8.4.4 HTTP Interface Does Not Work
- 8.4.5 Telnet CLI Does Not Work
- 8.4.6 TFTP Server Does Not Work
- 8.4.7 Setting IP Address using Serial Port
- 8.4.8 RADIUS Authentication Server
- 8.4.9 TFTP Server
- 8.4.10 Recovery Procedures
- 8.4.11 Soft Reset to Factory Defaults
- 8.4.12 Hard Reset to Factory Defaults
- 8.4.13 Forced Reload
- 8.4.14 VLAN Operation Issues
- 8.4.15 Changes Do Not Take Effect
- 8.4.16 Link Problems
- 8.4.17 General Check
- 8.4.18 Statistics Check
- 8.4.19 Analyzing the Spectrum
- Frequency Domains and Channels
- Boot Loader CLI and ScanTool
- Technical Specifications
- Part Numbers
- Regulatory Approval and Frequency Domains
- Integrated Dual Polarized Panel Antenna Specifications
- Radio and Transmission Specifications
- OFDM Modulation Rates
- Wireless Protocol
- Interfaces
- Transmit Power Settings
- Receive Sensitivity
- Latency
- Latency
- Management
- Power Supply
- LEDs
- Software Features
- Hardware Specifications
- Physical and Environmental Specifications
- MTBF and Warranty
- Lightning Protection
- Statement of Warranty
- Technical Services and Support
Troubleshooting
Tsunami QB-8100 Series (100 Mbps/5 Mbps Models) Installation and Management Guide 190
8.3 Communication Issues
8.3.1 Two Units Are Unable to Communicate Wirelessly
If a wireless link cannot be established after testing the two units within close distance of each other, then there can be two
reasons why wireless connectivity is not possible while the QB-8100 endpoints are at their desired locations:
There may be a problem in the RF path, for example, a bad connector attachment (this is the most common problem in
installations) or a bad cable (water ingress).
NOTE: The cables can be swapped with known good ones as a temporary solution to verify cable quality.
Another reason may be related to an interference problem caused by a high signal level from another radio. This can be
checked by changing the frequency channel and then verifying whether another channel works better or by changing the
polarization as a way of avoiding the interfering signal. To know in advance how much interference is present in a given
environment, a Spectrum Analyzer can be attached to a (temporary) antenna for measuring the signal levels on all available
channels.
NOTE: The antennas are usually not the problem, unless mounted upside down causing the drain hole to quickly fill
the radome with water.
If a wireless link is not established after testing two units within close distance of each other, then the problem is either
hardware or configuration related, such as a wrong Network name, Encryption key, Network Secret or End Point A Station
Name. To eliminate these issues from being a factor, resetting the both units to factory defaults is the recommended solution.
If a wireless link is not possible after resetting the units and verifying that one unit is a End Point A with WORP End Point A
interface configured and the other is an End Point B unit, then the problem is not configuration related and the only
remaining reason is a possible hardware problem. Acquiring a third unit and then testing it amongst the existing units will
help pinpoint the broken unit.
8.3.2 Surge and Lightning preventive maintenance
In case of any lightning or surge occurrence, check for the conditions specified below:
• Check the RF signals by referring to RSSI statistics and if the signal strength has been lowered considerably, replace the
surge arrestor.
• Unscrew the N-Type connector at the top and visually inspect the surge arrestor for electrical burns. If any, replace the
surge arrestor.