The Cisco 2Port OC-12 Packet-over-SONET (POS) backcard for the Cisco MGX 8800/8900 Series Route Processor Module (RPM) XF is designed for use with the Cisco MGX 8800 and MGX 8900 Series wide-area edge switches. This backcard is for use with the Cisco MGX 8800/8900 Series MGX-RPM-XF-512 to provide up to OC-24 of bandwidth for IP services in the new world of data networking.The Cisco RPM-XF 2-port backcard supports hot-pluggable physical interfaces for flexible configuration of varying connector types and drive distances.