Telephone test set having an auxiliary amplifier and speaker for permitting listening to line signals
First Claim
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1. A telephone test set comprising:
- means for coupling the test set to tip and ring lines of a telephone lines;
means for transmitting signals on the telephone line and means for receiving signals on the telephone line;
the means for transmitting and the means for receiving being selectively coupled to the means for coupling;
selectively energizable amplifier means for amplifying signals appearing on the telephone line;
speaker means coupled to the amplifier means for reproducing signals appearing on the telephone line; and
control means for disabling the means for transmitting and the means for receiving when the amplifier means is energized to prevent acoustic feedback to the amplifier means.
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Abstract
An improved telephone test unit is disclosed which permits the telephone line technician to selectively choose the audio reproduction of signals ocurring on the line without the use of the handset in the test unit. An auxiliary amplifier is provided to amplify the signals which are received from the telphone line. When the amplifier is activated, the transmitting unit and receiving unit of the handset within the telephone test unit are electronically muted to prevent undesirable audio feedback to the amplifier. The gain of the amplifier may be selectively varied between an off, low and a high gain condition. The amplifier is also usable in the "monitor" condition of the telephone test unit.
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Citations
10 Claims
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1. A telephone test set comprising:
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means for coupling the test set to tip and ring lines of a telephone lines; means for transmitting signals on the telephone line and means for receiving signals on the telephone line;
the means for transmitting and the means for receiving being selectively coupled to the means for coupling;selectively energizable amplifier means for amplifying signals appearing on the telephone line; speaker means coupled to the amplifier means for reproducing signals appearing on the telephone line; and control means for disabling the means for transmitting and the means for receiving when the amplifier means is energized to prevent acoustic feedback to the amplifier means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification