7 www.triplett.com UM-CTX690
Checking Status and Polarity of Phone Lines
Indicates proper line polarity and status by lighting its LED either
Green or Red.
Do not connect to circuit carrying AC voltage in OFF/LINE mode.
1. Move the left slide switch in OFF/LINE position.
2. Attach either the RJ12 plug cable for checking
Line 1 and Line 2. Or the alligator clips for
checking Line 1 only to the connection to be
tested.
3. Connect black clip to Tip (+) and the red clip to
Ring (-) or one clip to each wire of the pair if
designation is unknown.
• If the green light up indicates the polarity is
correct/normal. It means that the black clip
connects to Tip (+).If the red light up, it means the
clips are reversed.
• A bright LED indicates the line is not in use.
• A dim LED indicates the circuit is in use.
• Flickering red & green indicates presence of AC
power or ringing line.
4. Dial the line to be verified. If the Net Toner is connected
to the correct line, the Line 1 LED will flickering red and
green.
5. Monitor the line; move the slide switch to “Cont”
position, this will terminate the call to confirm the
identification.
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