I have a Belkin router. I don't know the exact model, can't find it anywhere, it just says "Belkin VoIP 802.11g gateway". It's pretty big (ipad size) and tall (4 cm) and has an external antenna. The problem I face is that the signal strength is insanely low. I checked with iStumbler and it reports signal strength between 30 and 40 % and noise at 11 % constant. The channel is 1, and other routers around have either 6 or 11.
I cannot pinpoint the reason of the problem. It's not my laptop, another laptop has exactly the same report. Do you have any suggestions ?