Apparatus for use in isolating the cause of a dropped telecommun

Details Apparatus for use in isolating the cause of a dropped telecommun Apparatus for use in isolating the cause of a dropped telecommun

1994-05-06

1995-08-15

Chin, Stephen

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

379 1, 379 35, 379112, 379113, 379133, H04M 124, H04M 322, H04M 1500

Patent

active

054426790

ABSTRACT:
A data acquisition apparatus, for use as a diagnostic tool in isolating the cause of chronic dropped telecommunication calls, monitors electrical signals associated with multiple telecommunication trunks. It recognizes each occurrence of a terminated call based upon loop current cessation of a duration greater than a predetermined time interval. Each occurrence of a terminated call, as well as electrical data indicative of which equipment terminated the call, is time-stamped and recorded. The apparatus also time-stamps and records data regarding additional electrical events based upon pre-determined ranges of current and voltage. It creates a chronological log of the recorded data. The apparatus interprets the recorded data and provides an easily intelligible message indicating which equipment terminated a particular call. The recorded data and the messages can then be conveniently analyzed by technicians or other personnel on a display screen to determine which equipment dropped a call and to identify significant trends regarding dropped calls. The apparatus functions in a manner that is transparent to a customer so that it does not interfere with the customer's usage of the equipment being monitored.

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Dranetz Technolgies, Inc., "Operator's Manual, 626-PA-6002A DC Monitor, vol. 2," TM-110385-IU, pp. 1-1-1-3.
Tektronix, "TestLab: A New Test Strategy for Physical Measurements.".

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