User's Manual
Table Of Contents
- PTP 250 User Guide
- Copyrights
- Safety and regulatory information
- Contents
- List of Figures
- List of Tables
- About This User Guide
- Chapter 1 Product description
- Chapter 2 Planning considerations
- Chapter 3 Legal information
- Chapter 4 Reference information
- Chapter 5 Installation
- Chapter 6 Configuration and alignment
- Chapter 7 Operation
- Chapter 8 Troubleshooting
- Testing link end hardware
- Testing when PoE LEDs do not illuminate correctly
- Testing after a lightning strike
- Test flowcharts
- AC LED is off
- AC LED is flashing
- PORT LED is off
- PORT LED is flashing
- Test Ethernet packet errors reported by ODU
- Test Ethernet packet errors reported by managed switch or router
- Test ping packet loss
- Test resistance at the PoE end of the drop cable
- Testing the radio link
- Testing link end hardware
- Glossary
Link planning Chapter 2 Planning considerations
phn-2182_002v000
2-10
May 2011
When to install connectorized units
The majority of radio links can be successfully deployed with the integrated PTP 250.
However the integrated units may not be sufficient in some areas, for example:
• Where the path is heavily obscured by dense woodland on an NLOS link.
• Where long LOS links (>23 km or >14 miles) are required.
• Where there are known to be high levels of interference.
PTP LINKPlanner can be used to identify these areas of marginal performance.
In these areas, connectorized ODUs and external antennas should be used.
The external antennas can be either dual-polarization (as the integrated antenna) or
two single polarized antennas can be used in a spatially diverse configuration. It is
expected that the dual-polarization antennas would normally be used to simplify the
installation process; spatially diverse antennas may provide additional fade margin on
very long LOS links where there is evidence of correlation of the fading characteristics
on Vertical and Horizontal polarizations.