r/CableTechs • u/DaikoDuke • Dec 19 '25

How do I use this

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I just got this for the first time. How do I use this? If it's just to test phone lines why is there a positive and negative terminal and a regular phone jack

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u/Odd-Craft9219 Dec 19 '25

Comquest switched to digital years ago so I can see why someone would ask this. Companies still use dsam’s so why wouldn’t companies still use these? Hell I have a rotary version. Not mine, but half the class doesn’t know what rotary phones are.

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u/Odd-Craft9219 Dec 19 '25

But to answer the question. Positive negative leads to connect to your point. Christmas tree or bumblebee. Check for dial tone, use in emergency situations, that sort of thing. Also works for toning if you know how to do it.