Cisco Edge Performance - XFP transceiver module - 10 GigE - DWDM - LC single-mode - up to 31.1 miles - OC-192/STM-64 - 1560.61 nm - remanufactured - for P/N: 15454-10GE-XP-WS/ 15454-ADM-10G-WS/ 15454-AR-MXP-WS/ 15454-AR-XP-WS/ 15454-GE-XPE-WS