EKF presents the DC2-STAG, an XMC style mezzanine card, designed for dual PCIe x 4 external cabling (host system adapter). The module is provided with two PCIe x 4 front panel connectors, for attachment of one or two remote target systems via PCI Express.
AOC (active optical cables) allow for up to 300m cable length. For distances up to 7m low cost copper cables are available. Coupling systems by PCI Express® is a solution with significantly more throughput and lower latency compared e.g. to Gigabit Ethernet.