Rear Transition Module
ATCA rear transition module is an I/O extension for Advantech ATCA CPU blades. To meet serviceability, it is designed as a fully managed and hot swappable FRU. On board SAS controller supports two 2.5 inch hot swappable SAS HDDs which operate up to 3.0 Gbit/s, and provides external mini SAS connectors on rear panel for failover cabling. Via USB-to-UART transceiver, frontboard UART can be exported to mini USB connector on RTM. Two Ethernet GbE ports provide extra two I/O LANs for rear access. Two