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What is Improved Telephone Test Set Design about?

This patent describes an improved telephone test set that can operate with low voltage line conditions. It connects transmitting and receiving voice communication circuits in parallel with tip and ring lines to isolate them from voltage drops. It also connects a polarity indicating circuit in series with the voice circuits to indicate current flow direction between tip and ring lines. This improves on prior art test sets that could not continuously indicate polarity or operate well on low voltage "dry loops

Author

hernandez.josedomingo6804

Language

EN