One of the trick with lightning is making sure that all protection is tied to the same ground, so that no difference in potential exists between grounds. Make sure that the telephone, catv, electrical, satellite, and any other grounds all tie to the same place, and that all grounds are properly tied together to form a complete grounding system.
The concept is that a lightning strike is going to raise the ground potential of the surrounding area, and that by having all ground tied together as a complete system, you attempt to eliminate the differential between grounding points.
By typing all the grounds together at the perimeter, you attempt to keep the lightning from entering the structure in search of a better ground.
Make sure that all services are properly protected by lightning arresters at the service entrance. http://www.polyphaser.com
polyphaser makes high grade lightning arresters, as do others. http://www.lightningsafety.com/
has some more info.
Motorola has a manual on site grounding for communications sites, known as the R56 standards and guidelines for communications sites, which contains a useful section of grounding. http://www.motorola-wls.com/Dynamic/Course_Description.asp?number=ANT001-CD&CourseKey=125
[This message has been edited by techie (edited 01-24-2007).]