Gizmo is another peer to peer VOIP service. It uses open protocols like SIP (Session Initiation Protocol) and Jabber, unlike Skype, which uses proprietary systems. It works across the Windows, Mac, Linux and Symbian operating system. It is free and cab be downloaded from www.gizmoproject.com.
Backdoor Dialing (Free Calling)
Approximately 11% of US telephones, including mobile numbers and land lines from carriers such as Verizon, Sprint, T-Mobile, etc., are connected via VoIP. Working with telecom partners we are now making it possible to dial these numbers without going through the traditional phone system.
This means you can call certain mobile and land line numbers from any computer connected to the net and talk for free. Because these calls are bypassing the traditional phone network entirely there is no per minute fee or other charge for the caller regardless of where they call from.
First check the number is available for backdoor calling. Click here
How to do backdoor dialing:
Backdoor Dialing Model
Two-way calling feature:
After calling a mobile or land line phone that's available for Backdoor Dialing using Gizmo5, the person you called can call you back directly on your computer anytime you're logged in to Gizmo5!
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