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Just got this to extend range to another building. However, looking at the set up it appears that I have to have my main computer connected to the internet, and connect a cable to the antenna via the power injector. The only problem is I have only 1 LAN port on the back of my computer with internet coming from the service. I have to log on to the internet while the connected to the antenna to program it. Confused... Can anyone help? A phone call to support got me transferred and they hung up on me.

Thanks!