|"Router can't handle all the things we have hooked up."|
Nonsense. A router is a switch with the extra ability to connect two different networks. You don't need anything different. As ace omega has told you in both your posts, change the channel on your wireless router, it may be interfering with your cordless phone. Whoever looked into your problem and told you you need a switch doesn't have the slightest idea what they are talking about.