Basically, it's using the internet for phone calls, but you can use a regular telephone at either or both ends of the call and it will work. Customers use the special adapter box or also called ATA, which they plug into their high-speed internet access, and then into a regular telephone. You might want that for family or friends back home, but I'm not sure if it would be practical to carry around the little adapter box and find places will let you plug in. You can get a Wi-Fi box so it will work anywhere you have access to Wi Fi. You could call for free from literally anywhere in the world where you had high-speed internet access. You can add a global phone number which your family and friends could call you at for free, or at least for the price of a US phone call (if you are travelling abroad from the USA). For an example, if you were in Sydney, Australia and were setup to receive calls to your phone from your home city of New York.
Alternatively you can get our mobile app that will work with your smart phone. This APP can be downloaded directly from iOS Apple Store or Android Google Play.
Or try WebRTC that works in new browsers like Chrome or Opera without the need to install any software.
You could also use any telephone, and call into the Globalink Gateway, and then connect to whatever number you want to call, pretty much like any calling card. The best benefit on cost is whenever you happen to be in a local calling area for the major cities that are our calling portals.
By the way, one nice feature is that when people leave you voicemail at the designated number, it will send an email to you with a wave file or mp3 file so you can hear messages that way. So even if you were just at an internet café, you could get your messages (probably cheaper than calling somewhere.) Some people like the service just for this feature.
For more info visit our International Travel Portal