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Design of Ethernet the Optical & Electronic Media Converter Based on the IP113S with Network Management Function

Author: ZhangShaoJie
Tutor: RenHaiLan
School: WRI
Course: Communication and Information System
Keywords: Photoelectric media conversion Electromagnetic interference electromagnetic compatibility Serial Management Interface RS-485 bus
CLC: TN859
Type: Master's thesis
Year: 2008
Downloads: 155
Quote: 1
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Abstract


With the rapid development of information construction , as photoelectric media conversion key equipment , fiber optic transceivers increasing importance in enterprises put forward higher requirements on the transmission capacity of fiber optic transceivers , the specific performance , fiber-optic transceiver should be more intelligent, to support link state failover , traffic control , port auto-negotiation function . In the area of network management functions , requires the use of -band network management and OAM maintenance frame function , so that managers can easily monitor and manage remote fiber-optic transceiver , but also reduce the cost of network maintenance . In addition , the network management also has a bandwidth control function , you can use it to limit the access link traffic flow control to do so put the client . In this context , based IP113S managed fiber optic transceiver design of this research project , the main contents are as follows : 1 . IEEE802 Ethernet standards and technical requirements and managed fiber optic transceiver completed photoelectric media conversion chip , optical transceiver modules and the electrical interface selection ; were designed after careful study of the optical media conversion core chip functionality and Ethernet optical transceiver works , the application characteristics , the photoelectric media conversion chip peripheral circuits , optical interface circuit and electrical interface circuit , and completed the schematic design . Ethernet optical transceiver circuit . Belong to the high-frequency circuit (generally higher than 1MHz) , electromagnetic interference is the most important factor to affect the performance of the electromagnetic compatibility of high-frequency electronic circuit analysis , to find a high-speed PCB layout suppress EMI (electromagnetic interference) , the board and complete fiber optic transceiver PCB ( printed circuit board ) design of optical media conversion chip serial management interface (CPUIO the CPUC) to read and write timing diagram and related chip pin study , a the cascade network management board on the management of the fiber-optic transceiver board and communication interface design . Design of the RS-485 bus interface circuit 485 bus master from the half-duplex communication protocol and frame structure , the master network management board of the cascade from the control network management board .

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