Cisco - SFP (mini-GBIC) transceiver module - ATM - fiber optic - LC single-mode - up to 9.3 miles - OC-3/STM-1 - 1310 nm - refurbished - for P/N: NM-1A-OC3-POM-RF/ SPA-4XOC3-POS-V2/ SPA-4XOC3-POS-V2=/ SPA-4XOC3-POSV2-RF