DWDM-SFP-4056-120-AO - AddOn - SFP (mini-GBIC) transceiver module

1GbE - 1000Base-DWDM - LC single-mode - up to 120 km - 1540.56 nm - TAA Compliant - for Cisco 29XX, 39XX; Catalyst 3750, ESS9300; Ethernet Services Plus Extended Transport 20