The RTM-5104 is a single slot (6HP) ATCA rear transition module for I/O extension of Advantech ATCA CPU blades. To meet serviceability requirements, RTM-5104 is designed as a fully managed and hot swappable FRU. The stroage tray supports up to two hot swappable 2.5" SAS HDD or four MO-297A SSD’s, and can be operated up to 3.0 Gbits/sec. Two external mini SAS connectors are provided on the rear panel for failover cabling as a separate part number. The RTM implements a miniUSB connector that provides a host powered USB slave port exposing a UART port of the front blade via USB. Two Ethernet GbE ports provide two additional I/O ports for rear LAN access. One USB port (USB 2.0) supports USB devices such as keyboard, mouse, USB Flash drive, or USB-CDROM. <br /> The RTM also implements one Fabric Mezzanine Module type II socket to support flexible IO extension like 10GE ports, a server type graphics module or PCIe expressed based offload. With a PCIex16 or 2 PCIex8 gen.3 ports interfacing to the front blade, the FMM socket is not only a perfect solution for IO port extension but also custom acceleration and interafces.