Used ordinary phone connection to start with until I started getting £ 300 plus phone bills with alarming regularity....I found the perfect solution in skype...my wife on computer me on phone...at the time only the '3' network provided skype....no problems with connection.
Btw My wife never had home computer until I bought her one...the best money I spent..the money you will save in phone bills will far out weigh the £ 300 or so for a computer and line rental for your beloved...believe me, I know.