Travis Jordan wrote:
Travis Jordan wrote:
I don't know of any reliable 'low price' 4 km remote phones. Here
is one higher-priced option; obviously, it would be illegal to use
one of these in India without a proper license (which may not be
possible to obtain). You may also want to mount gain antennas at
both the remote and local end to insure reliable service.

http://www.nordsudtt.com/voyager/

Here is what looks like the same phone at a more reasonable price:

http://www.thehightechstore.com/voyager2200.html

The lower priced phone is only 600 mw RF output (base and remote) rather
than 3 w; however, this might still be perfectly adequate with roof top
mounted yagi's at each end. The free space path loss at 4 km at 900 Mhz
would be about 39 dB.

Note that the phones are made in Taiwan so you may be able to find an
Asia - Pacific seller.