Apparatus and method to test the condition of an electrical serv

Details Apparatus and method to test the condition of an electrical serv Apparatus and method to test the condition of an electrical serv

1975-07-30

1976-09-28

Olms, Douglas W.

179 1PC, 179175, H04M 322

Patent

active

039833380

ABSTRACT:
Apparatus, method and system to check the operability of an electrical service line, such as a telephone service line or other low voltage service line, between a test station and a telephone service installation or other electrical equipment connected to the line, even in the absence of any telephone set or other electrical equipment connected to the line at the service installation, including an electrical device connected to the line at the service installation to receive a signal transmitted thereto from the test station and to modify the signal returned to the test station to indicate the operability of the line and to modify the signal to indicate the presence or removal of any telephone set or other electrical equipment connected to the line at the service installation.

REFERENCES:
patent: 3513261 (1970-05-01), Dal Monte
patent: 3526729 (1970-09-01), Andrews et al.
patent: 3660620 (1972-05-01), Schimpf
patent: 3663769 (1972-05-01), Boatwright et al.
patent: 3668324 (1972-06-01), Firestone
patent: 3781857 (1973-12-01), Stendig et al.

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