The Design And Implementation Of IPPBX

The traditional PBXs were playing a very important role in the traditional telephone communication architecture。 They are still the main communication form in many enterprises。 With the emergence of new technology and the development of people's need, the disadvantage of traditional PBXs has exposed。 First, they can't support the new technology VoIP very well; Second, as all of them were designed under private technology, and they can't communicate with each other very well, which makes the enterprises spending much more money in supporting and upgrading。 The appearance of IPPBX, which based on IP technology, may solve the problems referred before。 The IPPBX combines data and voice, and will play a much more important role in the future telephone communication architecture。 The paper first introduce the development of VoIP, including it's history, principle, technology development, and then study the principle and system architecture of IPPBX, give some factors which affect the development of IPPBX。 In the second part of the paper ,the design of the IPPBX under embedded system is described。 In this part ,the author mainly describes the design of the IPPBX driver ,and then give a design of a real solve example about H323 over NATs/FW。 In the end of the paper, the author mainly study the stability of the IPPBX system。...