The XChange1004 is a 6U CompactPCI dual PMC carrier card with a PICMG 2.16 Gigabit Ethernet interface. The XChange1004 detects if it is a system controller and configures the cPCI bridge to operate in transparent mode. (A PrPMC must be installed on the XChange1004 if it is used in the system slot, since there are no intelligent devices on the XChange1004.) As a peripheral, the cPCI bridge operates in non-transparent mode, which offers address isolation, in addition to electrical isolation.
PICMG 2.1 Hot Swap support allows the XChange1004 to be installed into a live system without disrupting CompactPCI bus activity. In addition, the system management bus support allows the card to be powered down and reset remotely through the PICMG 2.9 IPMI interface. The IPMI interface also allows for the monitoring of voltage and temperature levels on the cards attached to the two PrPMC slots.