It is not possible to make a direct 30 km connection, even if you have line-of-sight. You will need some relay points in between. The relay points must have line-of-sight with each other and the end-points.

Our best antenna, the ISM 26 HP, has been used to make a 15 km connection point-to-point in ideal conditions with no interference from other 2.4 Ghz sources. But ideal conditions are rare, and we recommend that you do NOT make connections more than 10 km. Therefore, for 30 km, you will need two relay points between the two endpoints. Each relay point requires two antennas and two devices, and electricial power:

• 2x Antenna ISM 26 HP
• 2x SparkLan WAPR-141 access point devices
• 2x pigtail N/F - SMA reverse polarity (up to 5 meters)
• 2x RG 213 cables with N/M and N/F connectors. Length depends on the distance between the antennas and the SparkLAN AP (which must be inside, protected from weather). If the distance is less than 5 meters, you only need the pigtails, no cable.

The two SparkLAN devices at the relay point can be connected directly by crossover ethernet cable, so you don't need a computer at the relay site. But of course you need electrical power. You can also use our Outdoor AP/Client 11g + PoE mounted directly at the antenna, instead of the SparkLAN WAPR-141 + cable + pigtail. This is a little more expensive, but much easier to install, and has less loss because it doesn't use cables and pigtails. It needs only ethernet cable to supply thje signal and power.

At each of the two endpoints, you need one piece of each of the items listed above. So the total equipment for the two endpoints is the same as what you need at one relay point.