A CWDM OTDR test solution to deploy or maintain and troubleshoot in-service CWDM fiber networksVIAVI CWDM OTDR solution enables cable operators, dark fiber providers and telecommunication service providers to test through MUX/DEMUX and perform a complete end-to-end link characterization or troubleshooting of active C-RAN, DAS and mobile fronthaul CWDM networks. Learn more about OTDR Testing.