reply to quatrix
Re: Running Cat 5 from attic to downstairs outlet Above Room B (the office) is the master bedroom. Putting an access point directly above won't make much of a difference. The signal is only a problem at the opposite corner of the house. I recently replaced both 802.11g routers (the main gateway and a wireless bridge) with 802.11n, and it made no difference. Right now DD-WRT shows an SNR of 5 (which DD-WRT calls a "signal quality" of 29%) to the bridge and 1 (25%) to an Android phone in the same bedroom.