Loss of WiFi

[MacGyverLabs]

limeybj...

You're likely experiencing a wireless channel conflict between your cordless phones and your wireless router. 802.11b and 802.11g (commonly known as wireless-b and wireless-g) uses the 2.4GHz spectrum, and you mentioned that your cordless phones use this band as well.

There are a very limited number of channels (11 in the US) that can be used in the 2.4GHz space, and because of frequency overlap (I won't bore you with the details), there's really only 3 or 4 you can use in the same general proximity without issues (don't forget about neighbors, etc.). Based on the information you've provided, I'm pretty confident that is your issue.

Your options...
*Move the phones/base stations as far away from the wireless router as you can (although, it's still not likely you're going to get all of this to operate and play nice in the same house).
*Move up from wireless-b or -g to wireless-N with the 5.0GHz spectrum (wireless-N can operate in 2.4GHz as well, but based on your situation, you don't want that).
*Change out your 2.4GHz cordless phones for new 5GHz wireless.

Depending upon your setup, you'll have to determine which is the best/most cost effective upgrade for you.

Best of luck!