Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line
Patent
1984-10-26
1987-05-05
Schreyer, Stafford D.
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of trunk or long line
379102, H04M 330
Patent
active
046637753
ABSTRACT:
A method and apparatus are described for testing a telecommunication line despite a gap in a metallic line between the testing system at a central office and the subscriber's line. On the subscriber's or remote end of the gap in the metallic line, apparatus is provided for performing certain desired tests on the continuous metallic portion of the subscriber's line. This apparatus is connected to a testing system on the central office or local side of the gap with suitable communication equipment so that tests performed on the remote end may be reported back to the testing system. The remote end testing apparatus is similar to apparatus described in application Ser. No. 645,479. The testing system at the central office preferably is a conventional system, such as the MLT system which already is installed in many central offices throughout the United States, together with the necessary modifications to communicate with and control the remote end testing apparatus. The necessary modifications can be implemented in software by modifying the computer programs that run the MLT system. Alternatively, the necessary modifications are implemented in hardware by providing at the local end apparatus that can simulate certain operating parameters of the subscriber's line and by providing communication between the remote end testing apparatus and the simulation equipment.
REFERENCES:
patent: 4424421 (1984-01-01), Townsend et al.
Schreyer Stafford D.
Teleprobe Systems Inc.
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