The Cisco CRS Flexible PLIM is a next generation PLIM, which provides the flexibility and supports both: Cisco SPA (Shared Port Adapter) as well as integrated 10GE ports built into the PLIM itself. With four SPA bays available in the PLIM, those customers with any existing SPA install base can migrate their SPA infrastructure to CRS. With the CRS Flexible PLIM, the customers can also utilize built-in 6-ports of 10GE. These 6 x 10GE ports support multiple framing options including the OTN framing on top of the WAN and LAN PHY framing. Also, the 10GE ports will support Tunable DWDM optics, turning the 6-ports into 10GE IPoDWDM interfaces.