UltraFEDEnables copper test up to 30 MHz by a single technician; addresses test challenges associated with the pre-qualification and troubleshooting of VDSL and ADSL2+ networks.



Far End Device (FED)

The JDSU UltraFED, with the ability to test copper frequencies up to 30 MHz by a single technician, helps field teams maximize resources by addressing the specific test challenges associated with the pre-qualification and troubleshooting of VDSL and ADSL2+ networks.


  • Test frequencies from 300 Hz up to 30 MHz
  • Through Mode Testing and Dual Pair Testing
  • Improved test process
  • Powers on using field replaceable 9 volt battery and AC Adapter for extended use inside CO/Exchange


  • In all open mode, the primary and secondary tip (A), ring (B) and ground (sleeve) are disconnected from the cable pairs under test. The all open mode is used to isolate the pair(s) under test sup to the UltraFED.
  • In through mode, the primary tip and ring are connected to the CO tip and ring so testing may occur beyond the UltraFED. Through mode is the UltraFED default mode.
  • The strap mode connects tip (A) to ring (B). The most common use in strap mode will be loop resistance measurement. Strap mode may also be used to aid in resistive fault locate (RFL) measurements.
  • The spectral tones mode sends a complex tone across tip (A) to ring (B). Spectral tones are used for loss testing the line. The spectral tones can also be used when measuring crosstalk.
  • The spectral balance mode connects the complex tone from tip (A) to ring (B) to ground. Spectral balance mode is used by the test set to assess the balance of the line in the xDSL frequency range.
  • The trace mode connects the trace tone generator across tip (A) to ring (B). Trace mode is used to help a technician find the pair under test in a bundle of cables.
  • The tip/ring to ground strap mode connects the UltraFED tip (A), ring (B) and ground to the ground of the cable. The most common use by the field test set in this mode is during resistive balance smeasurement.
  • The Single tone mode connects a tone generator across tip (A) to ring (B). Single tone mode is used by the test set to measure loss.
  • The Three way strap tip mode, a type of testing which uses dual pair testing, connects the primary tip (A) to the secondary tip (A) to ring (B). This mode is used primarily for RFL measurement with a known good pair.
  • Quiet terminations mode is used to properly terminate a pair at the FED end.

Key Features

  • Off State: “Off” is the powered-down state. In this state, all circuits are open and the unit is in through mode (between the primary pair and central office pair). The unit draws just enough power to keep the wakeup circuitry active. Everything else in the unit is powered off, including the LED. The UltraFED will only respond to a wakeup signal or key press in the off state. The UltraFED can be left plugged into an electrical source at the Central Office/Exchange for extended testing without draining the battery. The pushbutton must be pressed once to get to the off state from other states.
  • On State: From the “off” state the pushbutton is pressed once to enter the “on” state. In the on state, the unit is active and responds to commands sent by an HST-3000. This state supports all UltraFED test functions. The LED flashes once per second to indicate that the unit is in the on state. Once in this state the UltraFED has a four hour timeout and when the pushbutton is pressed and released, the unit will go into the off state.
  • Trace State: When the pushbutton is pressed twice within one second the unit will enter the trace state. In this state, the unit is powered up and the trace tone is transmitted across the primary pair to help locate the pair at the other end. The LED flashes once every two seconds to indicate the trace state is active. Once in this state, if the pushbutton is pressed and released the unit will go into the off state. The HST-3000 can override this state and interact with the UltraFED using the wake up signal. This ensures that the engineer at the far location connects and tests the right pair.


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