I am losing a wireless internet connection?

ok, i have Comcast internet, Verizon landlines (phone), and Comcast cable television. I am renting a Netgear wireless router and modem. I have one PS3 hooked up to the wireless internet. However, when my phone rings, the internet connection drops and fails to reconnect. My coax cable and Ethernet cables (for my phone line) are totally separate! So this should not be possible. My two phone lines are connected to a splitter but that couldn't affect it.I tried to fix it myself but then it created a mive hum-bar problem on my PS3 but it doesn't even show up on the cable! ugh! I talked to both company's and they both said that this is not possible, and it shouldn't be! Has anyone had a similar problem like this?