Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1978-11-22
1980-06-17
Robinson, Thomas A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 66, H04M 326, H04B 346
Patent
active
042085535
ABSTRACT:
A testing and recording system is disclosed for determining and recording the cable pair-line equipment assignments in a telephone central office. Using a multipair shoe on the main frame appearances of the cable pair, an off-hook condition is simulated successively on each of a plurality of idle cable pairs. At the same time, the dial tone markers are monitored to determine which line equipment responds to the off-hook condition. If the off-hook test condition is of very brief duration and takes place during times of low central office traffic, there is a high probability that only one off-hook condition will occur during the test interval. If only one dial tone marker response occurs during this brief interval, the cable pair identification and line equipment identification are recorded to create a record of this assignment. Alternatively, a tone associated with each dial tone marker is detected to ascertain which marker responded to the simulated off-hook condition.
REFERENCES:
patent: 2585904 (1952-02-01), Busch
patent: 2869077 (1959-01-01), Houk
patent: 3427538 (1969-02-01), Bohnenblust
patent: 3559055 (1971-01-01), Thompson
patent: 3644687 (1972-02-01), Richards, Jr.
patent: 3902026 (1975-08-01), Rogers et al.
patent: 3973090 (1976-08-01), Miller
patent: 4028507 (1977-06-01), Hoppough
"Computer System for Main-Frame Operations (cosmos)"; 1976, International Conference on Communications, Jun. 14-16, 1976; pp. 13-20:13-22.
Bell Telephone Laboratories Incorporated
Nimtz Robert O.
Robinson Thomas A.
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