E1Ethernet Protocol Slot Auto-Negotiation Conversionthe Design And Implementation

Using E1link to transmit Ethernet data in reality has a wide application. Because E1and Ethernet data transmission protocol standard is not the same, They need to use the protocol converter to complete the data conversion. The existing E1/Ethernet protocol converter in converting data are for the entire El transmission capability based on, This paper is to realize E1/Ethernet protocol converter in case of the E1link time slot configuration flexibility to use, And the converter can be used as center to transparent forward E1link data.This paper presents a time slot auto negotiation E1/Ethernet protocol converter, E1link time slot of the converter for transmitting data can be configured through the remote network management, Two protocol converters at the ends of Each E1link can automatically configure slot consultations to reach agreement, Protocol converter can transmit and receive data in accordance with the configured time slot. At the same time, a switch built-in protocol converter can complete the E1link data interchange and realize the forwarding function of the central station.The overall scheme includes the hardware design and software design. Hardware design includes E1/Ethernet protocol convert. Mil to RJ-45interface convert、Logic controller Program controller、Switch chip. Program memory. Data buffer function module etc.The software design includes time slot configuration server procedures、time slot auto consultation procedure and the remote computer client program. Hardware’s realization use top-down design methodFirstly, completed the detailed connection design of the hardware functional modules, Then completed specific design of the E1/Ethernet data conversion using RC7222chip、MⅡ interface to the RJ-45interface conversion、 CPLD logic controller and the MCU program controller.The software’s realization use the first long method.Firstly,completed the specific design of remote client configuration software、server software and auto consultation software, Then descripted in detail the whole work process of system software through a complete slot remote configuration process.