Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1975-04-03
1976-08-03
Olms, Douglas W.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 66, H04B 346
Patent
active
039730905
ABSTRACT:
A telephone test and assignment bureau is provided with a telephone instrument interconnected with an automatic wire pair identification field unit. A telephone number to be verified is dialed on the instrument and a start button is illuminated when the connection is completed by the switching equipment. Pressing this button initiates the verification procedure, and the wire pair identification field unit sends an interrogate signal over the telephone line to the central office. A wire pair identification control unit is connected via shoes at the main distributing frame to the cable having the wire pair assigned to the telephone number dialed. When the interrogate signal is received by the wire pair identification control unit it sends an identifying code back over the same telephone line to identify which wire pair on the main distribution frame was selected by the switching equipment in response to the telephone number dialed. This identifying code is received by the wire pair identification field unit in the test and assignment bureau, and the number of the pair is displayed. The displayed number can then be checked against the telephone number assignment records.
REFERENCES:
patent: 2799739 (1957-07-01), Lowman et al.
patent: 2869077 (1959-01-01), Houk
patent: 3842218 (1975-10-01), DeLuca et al.
Barrett Patrick J.
Hewlett--Packard Company
Olms Douglas W.
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