Wi-Fi Router disconnecting on incoming house call

[shotcalla]

When ever i use Wi-Fi Router to browse the internet, and i receive a phone call on the house line, my internet no longer works! I try to continue to another website, but it just hangs.

Even when i do the repair feature in Windows, it doesn't work. I also tried stopping Wi-Fi Router, but the program crashes and i'm forced to soft reset if i want to reuse Wi-Fi Router.

This reminds me of the dial-up days Does anyone know a fix for this? Sorry if this question has been asked before, i tried a search!

P.S.: This happened on both Mighty and Juicy's Rom..