Triplett Fox & Hound 3 – PN: 3397 User Manual
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the modular jack to be tested, or connect the Alligator Clips
(E) to the line to be tested (Do not use the Modular Plug and
the Alligator Clips simultaneously). If Loop mA is present,
and in the correct polarity, the FOX’s CONTINUITY/TALK LED
(A) will light. If the polarity is incorrect, or Loop mA is not
present, the LED will not light.
Helpful Hints:
If using the Alligator Clips, and the LED does not light, try
reversing the positions of the clips. If the LED then lights,
Loop mA is present, and in the polarity indicated by the clips.
Although the LED will light on a BUSY (off-hook) line when
performing the test, the LED will light much more brightly if
the line is CLEAR (on-hook).
The FOX also indicates line polarity, when the line is CLEAR,
in the TONE Mode. However, the line polarity LED may or
may not light in the TONE Mode, on a BUSY line.
On analog phone lines, reversed polarity seldom causes a
problem. Many modular cords and couplers reverse the po-
larity of the phone line passing through them.
8.1.2.1: Ringing Current:
The FOX will signal the presence of ringing current by flash-
ing its LED. This indication is obtainable in either the OFF/
LINE POLARITY or TONE mode. Depending on the phone
system, the LED may indicate ringing current in either Nor-
mal or Reversed Polarity. To perform this test, simply con-