Research And Implementation Of Value-added Service Based On Soft Switch

The technology of soft-switch has been quite mature so far. Valued-added services based on the soft-switch are always demanding new items and its space of development is considerably huge. The high-speed development of broadband and wireless network brings great convenience to the majority of mobile phone and smart-PC-end users. It demands new requirements on developing valued-added services which are on the basis of soft-switch to combine the email, SMS, PC terminal soft with telephone services. In these days when the network is developing rapidly, rational integration of resources, optimizing the structure of the operational network, efficient conveniences to the users and voice communication services with high quality and low fees are the pursuits of small and medium-sized telecom agents.Mobile phones, traditional landline telephones and personal computers have popularized recently, and their degree of intelligence is higher and higher. With the high-speed development of network, telephone voice service has new forms and requirements. Based on the soft-switch, it can extend some new valued-added-services, such as telephone callback, telephone voice email, number follow me, virtual PBX and so on, which meet the users’and small and medium telecom enterprises’ demand.Telephone callback service provides convenience for telephone users to access VOIP network, especially when taking a international call, it can save telephone charges. By specific way, the calling number and called number are sent to the call-back platform which connects to calling user first and then called user, so that it achieves the two-party call. This feature is ideal for one-way charging users. On the functions, it can be divided into web callback, web schedule callback, SMS callback and Intelligent callback box sender. Web callback and web schedule callback provide timely and future telephone service for Internet users. SMS callback sends a specific formated message to to achieve call in case of no more costs. Because Intelligent callback box sender just need the equipment and not development any more, it is not the task of this thesis. Voice email service is applied on when one phone is calling the other phone, if the other phone was turned off, or failed to answer lasting too long time, It can save content of conversation as file and then send that file to the mailbox of opposite side so that it can avoid the call information being lost. Compared with several major telecommunications companies, the fee is completely free.Number follow me service applys to answer calls in the different areas which will produce a higher roaming fee. To avoid this situation, the calling number can be forwarded to other phone.Virtual PBX is applied in some small-sized and medium sized enterprises. As various departments provide customers with different business consulting, to implement traditional PBX functions will need to purchase equipment. If using a virtual switch software which has exchange functions to replace it to provide secondary dial-up service for the users can save many fees. Compared to the traditional PBX switches, the investment can be significantly reduced.In accordance with the Uphone Corporation’s development requirements, the above four value-added based soft-switch unctions, using the H323protocol stack to develop a background service software and WEB technology to develop the front of the guest operating site. The testing results show that:the callback function is relatively stable, and already have a large number of customers; telephone voice email, number follow me, and virtual PBX have part of the customers and are still in the development stage.