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He should first check if he is able to boost the signal strength by going into the settings for the router. Mine gives me a drop-down list with values from 25 mW to 400 mW. It was set to the highest by default, so if that is the norm, then that will not do much good.
Altering the length of the antenna will not necessarily work. The antenna used on both sending and receiving devices is "tuned" to the frequency of the carrier signal (details: it should be either one quarter wavelength or 3/4 wavelength at the speed of light).
My recommendation is to somehow move the devices closer together or buy a repeater or second hot spot. I am about to do this myself and haven't figured out why there is a vast range of price for similar boxes. I am looking for one that has several cat 5 ports at 10/100/1000 and firewall and hot spot. The price range is $39 through $200+ for similar functionality as described on the packaging.
A number of inexpensive wireless routers can be configured for repeater duty. I'd recommend that course first, as few devices these days offer an external antenna connector. While you might not be able to be there with him, I'm sure you can download a pdf of the manual and walk him through the configuration over the phone.
Like others have suggested the antenna should work, but also check the location of the router. It should be away from cordless phone / microwave oven. also try changing the wifi channel on the router, sometimes it has interference from neighbours wifi / your own cordless phone. Also it should be higher from the floor and away from the wall.
Last Visit: 31-Dec-99 19:00 Last Update: 4-Dec-16 22:00