In-line switched telephone line tester

Details In-line switched telephone line tester In-line switched telephone line tester

1985-02-04

1986-12-02

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

379 19, H04B 346

Patent

active

046266330

ABSTRACT:
A switched telephone tester comprises a tester body defining a connector portion of complementary configuration for receiving a modular telephone plug, a light emitting element responsive to a given voltage for emitting light, and a switch coupled with the tester body and with the light emitting element and movable relative to the tester body to a first position for placing the light emitting element in electrical circuit across tip and ring contacts of the modular telephone plug and a second position for taking the light emitting means out of circuit across the tip and ring contacts, to thereby test for the presence of a voltage across the tip and ring contacts.

REFERENCES:
patent: 3976849 (1976-08-01), Champan
patent: 4373120 (1983-02-01), McDonald
patent: 4564728 (1986-01-01), Romano

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