Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Reexamination Certificate
1998-08-11
2001-04-10
Kuntz, Curtis (Department: 2643)
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Testing of subscriber loop or terminal
C379S023000, C379S026020
Reexamination Certificate
active
06215856
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to electrical test equipment and more particularly to telecommunications test equipment.
BACKGROUND OF THE INVENTION
When troubleshooting telephone lines, it is desirable to monitor the signal on the line of interest without introducing noise or other spurious signals onto the line being monitored. Such monitoring has been performed in the past by placing a high impedance signal monitoring device across the line. This required gaining access to the line by, for example, electrically connecting some form of monitoring connector, such as a jack, across the line. The very act of inserting a monitor plug or similar connector into the jack, however, can diminish the accuracy of the monitoring process.
SUMMARY OF THE INVENTION
The present invention relates to apparatus for monitoring telecommunication signals on at least two telecommunication lines. The apparatus includes a jack having at least two terminals which are electrically connectable to a signal monitoring device. A switch having a neutral position and at least one operative position enables selective switching of the terminals of the jack from an electrically disconnected position with respect to the telecommunication lines to a position which electrically connects the terminals of the jack across selected ones of the telecommunication lines. The signal monitoring device is connected to the jack while the switch is in neutral position. Thereafter, the switch is moved to an operative position electrically linking the signal monitoring device to the telecommunication lines. The apparatus reduces spurious signals, spikes, noise and other distortion which occurs when a signal monitoring device is directly connected to a telecommunication line monitoring jack without an intervening switch mechanism. In addition, the apparatus permits signal monitoring of both incoming and outgoing telecommunications lines.
REFERENCES:
patent: 4513176 (1985-04-01), Fostveit
patent: 4581494 (1986-04-01), Pickens
patent: 4756017 (1988-07-01), Bush
patent: 5553116 (1996-09-01), Avni
patent: 5742665 (1998-04-01), Chao
Aponte Luis A.
Benda Mark
DeVincentis David Stephen
Avaya Technology Corp.
Duane Morris & Heckscher LLP
Kuntz Curtis
Tieu Binh K.
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