Over Internet Protocol (VoIP) is what you need.
VoIP: cost effective and user friendly
If you are looking for a cost effective and convenient communication channel then, Voice
The call quality and ease of use for VoIP is the best compared to the traditional telecom products. And to top it all, the cost incurred in making domestic and international calls is much less than what you would normally pay. In fact, the Irish have already welcomed the technology with open arms and almost every house is equipped with this facility.
Why don't you go and check VoIP out. After all, it is something that you need.