ENGINEER DESIGN Mainly for data exchange equipment, such as 10/100M router and multiplexer and top box. Mainly for data exchange equipment, such as 10/100M router and multiplexer and top box. Mainly for data exchange equipment, such as 10/100M router and multiplexer and top box. Mainly for data exchange equipment, such as 10/100M router and multiplexer and top box. Mainly for data exchange equipment, such as 10/100M router and multiplexer and top box.