What is a good work-around for wireless internet loss due to cordless phone interference?

I've got my apartment set up with a wireless network that feeds 4 computers. At times, the phone will ring and either 1) knock all computers off the net without someone answering the phone or 2) knock everyone off the net once the phone has been answered. Usually once knocked off the net, the wireless router needs to be reset. I've used two different brands of routers with the same network loss results. Any ideas? (aside from systematically removing cordless phones from the house and replacing them with new ones)