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
PTP 250 User Guide Grounding and lightning protection
phn-2182_002v000
May 2011
2-15
• In high lightning prone geographical areas, additional ground kits should be
installed at spacing between 15 to 22 m (50 to 75 ft
). This is especially important
on towers taller than 45 m (150 ft).
A schematic example of a mast or tower installation is shown in Figure 2-3.
Figure 2-3 Grounding and lightning protection on mast or tower
LPU
Tower
ground bar
External
ground bar
Master
ground bar
Ground ring
Outdoor CAT5e cable: gel-filled,
shielded with copper-plated steel
First point of contact with tower
Mid-point of tower
Bottom of tower
CAT5e cable: foil or braid screened,
with screened connectors
PoE Injector
Equipment building
Network
switch
ODU
PTP 250 ground cable
Tower/building ground system