The milliwatt tone and quiet battery are still with us here too but that isn't what the OP is asking about. For the milliwatt tone and QB you have to dial into them from the line you want to test, so you obviously have to already have the line identified. It's not going to be of any help finding a pair nor was it meant to be.

Come to think of it I have heard the suggestion to call the line in question and run your probe down the blocks looking for the ringing. I've never tried it so I can't say anything about how it works.

-Hal

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