Abstract
In commercial society, it is a significant issue to enhance an image of an enterprise. Toll-free phone service has been a tool to enhance it. They can apply for this service from telecomm and integrate their private branch exchange (PBX) to build their call center. Their customer uses this service to make a free phone call to them, ask for product supports and give feedback to their service. Nevertheless, this service leaves something to be desired. First, it is inconvenient to apply one toll-free phone number, and this service is applied for commercial use sometimes. Therefore, when a customer wants to find a specified employee in the enterprise, he/she should dial to the call center first and transfer to the employee’s extension. Hence, we proposed a flexible, user-friendly, high-quality toll-free phone service. We exploit Cloud Bridge System (CBS) to transfer costs to people who applied this service and it provides high voice quality and a flexible calling mechanism. Besides, we implement a RESTful API in Java to help various clients to communication with our service. We design two clients for different type of people. One type is a group of people who provide his/her toll-free phone service to others. We design an Android App for them. They can use more functions such as managing time periods, contacts, etc. The other type is a group of people who use toll-free phone service provided by the former group. We design a responsive web for them. They add this web page link as an icon on the home screen of their device, and then they can make free phone calls via this icon. Finally, we use QR codes make people who provide toll-free phone service can share their QR code to let others to use the service they provided intuitively.