wireless distance of 2 km

Are there any buildings or geogrraphical features that are in the way. If there are, you will have to be able to clear those obstructions, so You may need a tower of some sort.

Turn them down to 1 Kbps speed an they'll. work. That's about one thousandth the speed of DSL.

The point I'm trying to make is you need to provide more information.

Are the two locations at the same elevation? How high a tower can you put at both ends, or at least one end? Any trees or hills in the way? What bandwidth (speed) are you expecting. What reliability do you want?

Just out of curiosity (and to be my usual annoying self), he didn't give details, this is a wireless group, how do you know the OP doesn't want two tin cans and a string? Strings are wireless... why complicate things with electronics? :)

You're right. Maybe he could implement an RFC1149 network.

Scott

Just out of, yet more, curiosity... What is the practical limit of that mechanical "push me, pull you" technology? Some nutter must have tried for a record :-)

Slatts

Actually "sound Tubes" have been around for many years, Longest I see at this site (taxi queue at melbourne airport) are 13.6 Kilometers...... That's a whole bunch more than 2!, and it's definately wireless! :)

thread:

Use these calculators to determine the gain you need on each end:

Read link above plus this link:

Come back here to ask specific questions afterwords.

Steve