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Bruce in Alaska[_2_] · October 10th 07, 06:20 PM posted to rec.radio.amateur.homebrew

In article ,
(Geoffrey S. Mendelson) wrote:

20 KM, is an awfully long range for a MESH network anyway. If you
have a reliable range of 150 feet (50m) per node, and place them 300m
apart, a strip 20km long by 100m wide would need 50-60 nodes depending
upon terrain, buildings, etc. With a possible 25 hops between a remote
device and the Internet, latency would be too high (it would take too
long) for VoIP or videoconferencing. Web surfing, email, file transfer,
data telemetry, would probably be ok.

20Km isn't at all a long distance, IF one uses High Gain antennas on
both ends of the 2.4Ghz link. My T1 Phone link runs 20Km using Part15
Devices (LynxBoxes) and 6 Ft Parabolic Dish Antennas on each end.
We had to install a 6DB Attenuator in the Feedline at both ends of the
Link, just to keep the RSL in the AGC Range of the Receivers. One just
needs to understand the parameters of the Path being used, and the
hardware required to make the Path work with the appropriate Path Losses
involved.

This is an Unlicensed Link owned and operated by ALASCOM, our Longlines
Carrier.

It also is colocated with a WiFi Network of Access Points that
distributes IP Traffic to our local community, which I own and
Operate. It is a matter of RF Engineering. Get that right, and
things can be worked out.

Bruce in alaska
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add path before @