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VIAVI DWDM OTDR Modules 4100 Series


The VIAVI DWDM OTDR solution enables performing a complete end-to-end link characterization and troubleshooting through MUX/DEMUX of newly deployed or active DWDM and Hybrid CWDM/DWDM networks. It’s the perfect OTDR for cable, mobile, and telecommunications operators dealing with C-RAN and mobile front haul access networks, passive DWDM networks for cable TV business services, and next-generation FTTH networks.


  • High performance single-ended test tool to qualify and troubleshoot Metro and Access DWDM network

  • Automatically identify and test DWDM port channel/link with patented WaveScan

  • Troubleshoot faulty links without disrupting traffic on active channels

  • All-inclusive solution for hybrid CWDM/DWDM networks when combined with VIAVI CWDM OTDR modules

  • Tunable DWDM OTDR in the C-band, C62 to C12 (1527.99nm – 1567.95nm/196.20 - 191.20 THz)

  • 50GHz/100GHz/200GHz channel spacing based on the ITU-T standard grid

  • 44 dB dynamic range for access and metro applications

  • Integrated C-band tunable laser source with modulation capability

  • Smart Link Mapper (SLM) option (icon based view of fiber link with splice, connector, MUX/DEMUX)

  • Compatible with T-BERD/MTS-2000, -4000, -4000 V2 and -5800 platforms

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