User Guide

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Continue tracing along the cable and when the tone disappear, the location of the
Probe is where the cable break. Adjust the gain control to “high” level to pinpoint
isolate the location of the break.
C. Line Testing Instruction
1. Set the “TEL/TRACE” selector to “?TEL” position.
2. Connect the RJ-45 modular jack on the Net Probe to a wall jack using the jumper
cable.
3. Check the LED indicators under “TEL”.
i. Identifying telephone line polarity and verifying telephone line’s function.
?? NORM. – This LED lights green when the analog telephone patch cable or the
outlet is installed properly. It indicates the telephone line carries proper
voltage and has correct polarity.
?? REV. – This LED lights yellow when the analog telephone patch cable or the
outlet is wired incorrectly. It indicates the telephone line’s polarity is
reversed.
? If both NORM. and REV. LEDs are on, the line carries AC current (abnormal).
Disconnect from the line and proceed with caution. If one of the LEDs is on
solid, this indicates the presence of DC current.
? If both NORM. and REV. LEDs are flashing, the line is ringing. You can use this
feature to verify the phone number.
? If one or both NORM. and REV. LEDs are on, electric current is present on the
center pair of the jack (wire 4 and 5 on RJ-45 or wire 3 and 4 on RJ-11 and
RJ-12).
? If none of the LEDs lights, the cable is most likely not connected.
ii. Checking low voltage (for AC or DC less than 24 volts)
? If the REV. LED lights solid yellow, the “+” test lead is connected to the negative
(+) DC pole and the “-“ lead is connect to the “-“ DC pole.
? If the NORM. LED lights solid green, the “+” test lead is connected to the
negative (-) DC pole and the “-“ lead is connected to the “+” DC pole.
? Tip Replacement
(1) To replace Probe tip, grab the tip with your fingers and twist it counter clockwise
until the tip comes off.
(2) Replace old tip with a compatible new tip (included) and twist the tip clockwise until
snug. Do not over tighten the tip.
? Low battery indicator
When the battery power is low, the “LOW BATT” LED will light red. Replace the old
battery with a fresh one.
? Battery Replacement
(1) The Net Probe requires one standard Alkaline DC 9 volts or compatible battery.
(2) Slide back the battery cover to replace the old battery with new one.
SS112102
Note: The tone is at its loudest when the tip of the probe is near and
parallel to the cable carrying the tone signal.
Use this function on the compatible “Analogue” telecom and network system only.