BUSTRONIC Upgraded 3U 6-slot OpenVPX backplane provides a centralized switching topology for a Gigabit Ethernet switch card. Product has two reserved P0/J0 signals Aux_Clk (+/-) and added two P1/J1 single ended Utility signals of GDiscrete and Maskable Reset. The SysCon signal is also now configurable. These changes will be implemented on the new backplane versions. OpenVPX is an effort by a joint group of companies to provide definitions for system interoperability. VPX is a highly flexible architecture, allowing a wide range of configurations and topology options.