Novel optical network terminal of ATM-PON (Asynchronous Transfer Mode-Passive Optical Network) access network system
1. The technology of ATM-PON and optical network terminal, which is applied in the direction of multiplexing system selection device, transmission system, digital transmission system, etc., can solve problems such as the inability to provide fiber-to-the-home requirements, and achieve ONT performance, The effect of simplifying system design and facilitating upgrade
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[0013] combine figure 2 , is a schematic diagram of the physical layer circuit system structure. It is mainly composed of an optical module, a clock recovery chip, and an FPGA chip. Among them, the optical module completes the photoelectric / electro-optic conversion function of the physical medium sublayer function, the clock recovery chip completes the bit synchronization function, and the FPGA chip completes the TC layer function. At the same time, the physical layer circuit board also has a power supply module to provide power for the system; a circuit status display and drive module to display the status of the system; FPGA configuration PROM module to store VHDL programs; a test input module that can input pulse and level signals ;Have UTOPIA interface module, provide interface with ATM layer: have reserved interface and FPGA status display module, provide FPGA debugging means.
[0014] combine image 3 , which is a schematic diagram of the sub-module structure of the...
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