Our AT&T data signal originates at a tower ten miles away. We can pick it up on a smart phone, but not with an air card. Is there a wirless base station that can connect to an external, amplified Yagi antenna. The idea is to amplify the distant AT&T data signal and retransmit the boosted data signal arond the house wirelessly, so it can be picked up by the AT&T Air Card.
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If you can put the aircard outside does it get a usable signal. You might be able to rig a USB cable outside to the device in a somewhat waterproof enclosure.
Unlike 802.11 type wireless where you can to a point mess around with antenna and stuff it is very illegal to put any form of antenna on cell phone type of wireless equipment. The only antenna you can use are the passive ones that have a antenna outside that brings the signal inside to another antenna with no power or electronics. The device and the cell tower can detect the power level and they dynamical adjust them to save battery and reduce interference. They can in theory detect when you have put antenna on equipment because the 2 unit talk and measure the levels. Not sure how much the FCC enforces this but the penalty is huge 10k fine plus up to a year in jail for the first offense.
I would be buying another cell phone to tether before I tried illegal antenna.
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