DWDM-SFP-3661-120-AO - AddOn - SFP (mini-GBIC) transceiver module

1GbE - 1000Base-DWDM - LC single-mode - up to 120 km - channel: 51 - 1536.61 nm - TAA Compliant - for Cisco 29XX, 39XX; Catalyst 3750, ESS9300; Ethernet Services Plus Extended Transport 20