Cisco - SFP (mini-GBIC) transceiver module - fiber optic - up to 13.1 miles - OC-12/OC-3/ STM-1/STM-4 - 1310 nm - refurbished - for P/N: 15310-CL-ACSAK9-RF/ 15310-MA-SA-RF/ 15454-ADM-10G-RF/ 15454-ADM-10G-WS/ 15454-MRC-12