If this is offi topic for this site I apologise in advance
I am using VOIP Cheap and have found it good - so far.
Looking on Ebay there are some devices that will plug into your home phone system and into your USB port which will enable your home phone to dual as a VOIP phone or a normal landline phone.
Example is at
http://tinyurl.com/e4zqtHas anyone any experience with these?
Is it a device that works on Skype only or on any VOIP system?