Back Board Routing Topology Back board routing topology included Centralized Switching,Distributed Switching,Hybrid Switching,Holst/Slave Switching.             Centralized Switching Distributed Switching Hybrid Switching Host/Slave Switching The Structure of Back Board VITA standard required the dimension of back board,tooling hole position and size,direction,each solt,and case heat dissipation etc. Back Board Connector Back Board use MULTIGIG RT connector,the