It is difficult to control and maintain a complex system which contains multi boards in a same frame

such as control of power on and power off

management of version

inspection and control of temperature

impact of business and fault inform in a same channel etc. I dissected Cisco12016 router and analyzed it care fully

and t hen I develop ed a c ontrol and ma intena nce mo del ba sed on CAN bu s myse lf. It was simulated on computer and tested by oscillograph and logic analyser

it was proved that the CAN bus model can solve the problems existed in complex system. Aside from the functions that were mentioned ahead

this article introduces inspection of power within board

testing and loading by JTAG

learning of slot ID. And the article describes the system design and I/O interfaces of CAN bus model.