Infinicom Unlimited Pinoy Calls is an example of a VoIP Service that works through the use of an Analog Telephone Adapter (ATA).
You will need to get this special adapter for you to be able to take
advantage of the internet and cut down on the charges for your overseas
calls. The adapter will be used to connect your regular landline phone
to the internet so that you will be able to make and receive calls to
and from anywhere in the world.In the case of your contacts in the
Philippines, they will not need computers, microphones, speakers, sound
cards, internet connection nor any bag phones to call you only their
regular landline phones or any mobile phone units.