Cisco EtherSwitch Service Module - For Optical Network, Data Networking - 40 RJ-45 Port Network LAN, 8 RJ-45 Port Network LAN, 2 Port SFP+ Network - Optical Fiber, Twisted PairGigabit Ethernet, 2.5 Gigabit Ethernet, 10 Gigabit Ethernet - Plug-in Module: