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Multiple service loop network series can implement the access of 2 channels of Ethernet, 2/4/8 channels of RS232/RS485/RS422 serial ports data service in two pairs of standard E1 channels, and support ring, chain and star and ring + chain + star and other complex network topologies. It can be extensively used in comprehensive access occasions such as data collection and video monitoring for machine room environment and unattended mobile basic station in special network of operator, power and railway system.
1、The system consists of central node equipment and service node equipment, and can support ring, chain and star and ring + chain + star and other complex network topologies and self-healing ring and automatic switching protection;
2、The system adopts grouped exchanging statistics multiplexing mode, which increases the usage of bandwidth greatly, and the number of service nodes is not restricted by the number of time-slots of E1;
3、The central node equipment can support 16 transmission directions and the transmission port can support 75Ω E1 and 120Ω E1, and any two channels of E1 can support loop networking, and the loop networks are separated. It has standard mechanical structures of 1U and 19 inches;
4、Service node equipment can provide 2 channels of switched Ethernet data ports, 2/4/8/ channels of RS232/485/422 serial ports. The Ethernet port can support 10/100M, semi-duplex, full-duplex and adaptive modes, and the serial data can support three communication modes: virtual serial port software, the controls developed by the company, Socket communication;
5、E1 transmission port of service node equipment can support power failure transfer function;
6、It can support three network management modes: equipment configuration program, Web Server, and central network management software. It can support remote on-line upgrade.
