OptiCaller is an application for Mobile PBX with unique call optimization. It allows the user to make calls in a flexible, and above all, more cost-effective manner (average 40-95% cost savings). OptiCaller also makes it easy to manage PBX functions, e.g. call diversions and presence status, directly from the mobile phone.The architecture is operator independent, which means that the application works regardless of mobile operator. The application has very flexible configuration options and is adaptable to suite the majority of PBX systems on the market. Configuration and deployment of clients (OTA) is easily handled by a powerful provisioning system.OptiCaller always takes control over how each call is connected and is thus giving the user the opportunity to call in the most cost efficient way.The call can be connected in three different ways * Direct Call