A 900 Mhz phone shouldn't interfere with a wireless computer network. It's the 2.4 GHz phones you have to worry about with 802.11b/g. I had less trouble with my old phone by forcing the 802.11b network onto channel 11. My new cordless phone claims to be "computer network friendly," and so far it has been (but I think the network is still on Ch 11, which helps).