Research, Based On The Atm Passive Optical Network (apon) System In The Optical Network Terminal (ont)

Information you are holding is the key to success. Everybody living in the present age was deeply affected by trepidation and exultancy the information bring to us. It is relate to the people living and the science developing and more intimately relate to economy and politics. People's requirement for information is more exigent than any times before. Network is known well for everyone. Along with the lOGbit/s technology used in trunk network, the developing of access network is go without saying. The Passive Optical Network based on Asynchronous Transfer Mode (APON) present the broadband access technique for 21 century because of agility and saving. This paper described studying of ONT (Optic Network Terminal) in the APON system. This project originated form the high-tech project of jiansu province. TITLE: STUDYING AND EXPLOITATION TO THE ONT OF OAN. CODE: BG2001046.The whole paper make up of six chapter and three parts. 1. Introduce to APON system; 2. Explain for the designing of ONT; 3. Testing to the system. The first part of paper introduced the knowledge of OAN and ATM. After that, paper analyzed the layered structure and criterion of APON system and the key technology for realization.The second part of paper introduced the location and function of ONT. Towards to requirement of function and the layered structure, we conceived layered designing and more giving the feasible scheme of realization and the method for each layer and the hardware requiring in design course. Design for the chip of TC layer is keystone to the realization of ONT. This paper provided the function block of the TC layer chip, and explained the method and process of design for each block.The third part of paper gave two set scheme for testing the system. The appendix included some parameter using in the design and the detailed flow chart of design and a part of testing result.