Enables technicians to install and troubleshoot copper-based single pair and bonded pair VDSL2 and ADSL2+ circuits the right-way -- dual ended with UltraFED IIB.

Dual-ended copper testing with an UltraFED IIB can isolate customer-affecting fault conditions that otherwise go undetected during turn-up and installation or routine copper troubleshooting.  The UltraFED IIB connects to the far end of copper pairs under test while a single technician controls it remotely using the HST-3000.


  • Reduces back-and-forth drive time to change line conditions Provides line terminations and remote test capabilities
  • Built for the future -- isolates crosstalk for VDSL2/ADSL2+ bonded pairs
  • Thru-mode operation takes customers out of service only when necessary
  • Greatly simplifies fault isolation and identification for less-skilled technicians
  • OneCheck™ diagnostics identify faults up to three times faster


  • Second-pair operation to accurately assess the effects of near-end crosstalk (NEXT) and far-end crosstalk (FEXT)
  • Remotely, from the VIAVI HST-3000, provide strap (short), open, drop battery, transmit tones and trace tones
  • View pair endings with TDR Helper, enabled on the HST-3000, which provides alternating short and open to the pair
  • OneCheck Copper Test Suite provides simple diagnostic tests that isolate typical faults a technician encounters every day
    • OneCheck Copper for DSL - Determines overall pair(s) health over the DSL technology provided  with thresholds and filters set by technology
    • OneCheck Series Fault - Check for series fault presence, typically  from splice failures
    • OneCheck Bridged Tap - Determines bridged tap (lateral) existence on the pair with distance to  and length of tap
    • OneCheck TrueLength - Provides actual pair length by correlating capacitive, resistive and TDR  loop measurements
    • OneCheck RFL Pretest - Indicates whether a resistive fault was  found and identifies to run next to precision locate it
    • OneCheck Kick Test - Quick copper-check to assess the pair's health prior to final test
    • OneCheck Shield Test - Determines resistance from the HST-3000 to the UltraFED IIB

Support at Every Step

We provide support, services, comprehensive training and the resources you need. It’s all part of what we do to maximize the value of your VIAVI investment.

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