With ClearVoip and a appropiate telephone and internet connection you can make phonecalls worldwide, also without a computer. You can buy many (also DECT) SIP telephones that you can simply plug into your router or hub; so no need for a computer.
With the right telephone or VoIP device you are even able to receive incoming calls from your normal telephone line as usual and you can simply choose the cheapest way for your an outgoing call each time you make a phonecall.
Telephones appropiate for Voip/SIP
To use ClearVoIP you need a VoIP/SIP telephone like the Siemens Gigaset (for instance the C470IP which combines your normal telephone line and gives you the opportunity to use 6 different VoIP providers, so you can use the lowest VoIP offer each time you want to make a call). Or for instance a Linksys VoIP router that enables you to use your current telephone and connect it to use as a VoIP telephone on the internet.
Ofcourse you may ask for Voip/SIP telephones in any shop that sells electronic devices. You can find the SIP configuration for ClearVoip.org in your ClearVoip.org control panel.
Companies can make huge savings (up to 80%) on international phonecalls:
If you have a switchboard in your company that can handle both normal telephone lines and VoIP lines, you can use ClearVoip.org to make (international) phonecalls at very competitive rates.
Also some companies just plug in one or two dect IP phones in a router or hub especially to make international phonecalls. That way you can control the costs (all calls made are visible in your ClearVoip.org control panel including times and charges directly after ending the phonecall).