Telephone line feeding circuit including a protective device

Details Telephone line feeding circuit including a protective device Telephone line feeding circuit including a protective device

1978-02-28

1979-09-11

Robinson, Thomas A.

179 18FA, 179 77, H04M 100

Patent

active

041676548

ABSTRACT:
A telephone line feed circuit is disclosed including a protective device which is located on the line ahead of the feeding device. The protective device reduces the voltage variations at the terminals of the feeding voltage in the event of overvoltage on the line. This advantageously protects the cross points of the switch against overvoltage.

REFERENCES:
patent: 3989902 (1976-11-01), Cowpland

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