Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – With blocking of normal usage
Patent
1988-04-13
1989-08-29
Schreyer, Stafford D.
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
With blocking of normal usage
379 21, 379 26, 379 29, 379102, H04B 346, H04M 124
Patent
active
048624918
ABSTRACT:
Apparatus for remote disconnection and short-circuiting of a pair of conductors, such as those comprising a telephone line, consists of a switching unit and a probe unit. The switching unit is capable of generating a tone and the tone may be sent down the pair of conductors, where the probe unit is used to identify the pair. The probe unit is also able to send bursts of a signal along the pair, upon receipt of which the switching unit switches sequentially from a first mode (when the tone is applied to the conductors) to a second-mode (where the conductors are disconnected) to a third mode (where the conductors are short circuit). The apparatus is useful in line fault location and telephone apparatus installation.
REFERENCES:
patent: 4536703 (1985-08-01), Jablway et al.
patent: 4686696 (1987-08-01), Lynch
La Salle Roger J.
Riordan Roger H. S.
Schreyer Stafford D.
Teletech Pty. Ltd.
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