The CM17212 and CM17215 are dual channel Ethernet modules. The CM17212 provides two RJ45 twisted pair connections with 10/100 auto-negotiation support. The CM17215 offers two 100Mb MT-RJ fiber optic ports.
Each Ethernet channel has its own controller, and operates independently. An onboard PCI-to-PCI bridge allows the board to only require one PCI slot.
The boards use the popular Intel 82551IT Ethernet controller, which is well supported by modern operating systems such as Windows and Linux.