Line of Sight

[lumason]

WHY LINE OF SIGHT IS A REQUIREMENT IN CASE OF BRIDGE TO BRIDGE CONNECTION AND WHY IS NOT REQUIRED WHEN AN AP TALKS TO A WIRELESS LAN CARD?

[ndoshi]

Hi ,

In case of bridge two antenna needs to lock with each other , So atnenna

allingment is one of the important porcess in bridge troubleshooting .

In case of bridge if antenna is alligned you will see middle led on bridge goes solid .

Not only line of site you need rf line of site .

In case of AP and client it is different concept , AP is like master which commands client

Nilesh

[scottmac]

It basically hinges on signal strength and bouncing surfaces. 2.4 G doesn't penetrate, it bounces. Indoors, there are plenty of hard surfaces for the signal (which is reletively strong) to bounce from, outdoors, there really aren't any, and the signal degrades (using a regular antenna) pretty quick.

Using gain antennas (like the parabolic shaped versions), the signal is concentrated in pretty much one direction (with an apparent amplification of signal). The receiving side also imparts a certain amount of gain (with the effect of amplifying the signal).

You CAN bounce around an obstruction outdoors, but the loss of signal strength is fairly pronounced, and the aiming of the (directional) antennas is critical.

Organic obstructions (like trees) eat / absorb nearly all of the signal and need to be avoided.

Good Luck

Scott