Local voip. Is it possible?

Hi, I hope someone can suggest something for me.

I have a Netgear WPN824 wireless router and WN511 cards in some laptops.

These, despite being MIMO equipment and supposedly resistant to interferance are anything but, with the router resetting itself with monotonous regularity. According the Netgear this is because I have wireless phones in the house.

I really don't want to abandon the roaming aspect of the wireless phones and equally don't want the hassle of having to install telephone extensions all round the house.

Trying to think laterally here it occurred to me that if there was such a thing as a voip gateway then I could connect my landline to it and transmit it around the house in the form of voip on my wireless network.

Does anyone produce such a thing?

I guess that'll be a no then.

Yes there is such a thing, a quick search on google comes up with this: D-Link DVG-G1402S Wireless 802.11g 54Mbps 4-Port Broadband VoIP Gateway Router with 2 Phone Ports - SHOP.COM

I don't know if it's any good, but quite a few companies produce devices such as this and this one came up first in google

trixbox with an FXO port for your phone line. then a wireless AP, a few UTStarcom 802.11 sip phones and your done.