Cisco - SFP (mini-GBIC) transceiver module - ATM/ SONET/SDH/ POS - fiber optic - LC/PC multi-mode - up to 1.2 miles - OC-3/STM-1 - 1310 nm - refurbished - for P/N: NM-1A-OC3-POM/ SPA-1XOC3-ATM-V2/ SPA-3XOC3-ATM-V2/ SPA-4XOC3-POS-V2/ SPA-8XOC3-POS