I have my Desktop upstairs connected to the BT line by a 10metre Telephone cable. The PC is connected by ethernet to my Belkin N+ wireless router. The router also is connected by ethernet near the PC to a Vonage "black box" broadband VOIP phone set up, and a similar 10 metre phone cable (with male/ female reversed to the first one) back down to near the BT entry. At that point I have 2 cordless answer phones one for BT and the other for Vonage. Both have 2 other cordless phone elswhere. I have tried the broadband speed by plugging the router direct into the BT test, but see little difference. It is important to have filters on all extensions. I get good wireless connection to my laptop , even through thick walls, and see little difference between it and the wired PC. I am getting about 6.5 Mbps now, (with Tiscali/ Pipex)which is better than 6 months ago when it was lucky to reach 3.