Special service signal tester

Details Special service signal tester Special service signal tester

1986-11-03

1988-04-26

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Using portable test set

379 22, 379 27, H04M 124

Patent

active

047410167

ABSTRACT:
The present invention discloses a unitary and hand held four conductor test apparatus that is designed to provide signaling operation tests on new or existing telecommunication special service circuits. The apparatus is comprised of circuitry which interconnects LEDs, a switching element and connection terminals. The apparatus terminates PBX dial tie trunk or special service circuit signaling leads at a designated "demarcation point" and it is designed to exercise or manipulate the special service circuit's associated line equipment for testing.

REFERENCES:
patent: 3941950 (1976-03-01), Dunwoodie et al.
patent: 3985974 (1976-10-01), Jusinskas, Jr. et al.
patent: 4022987 (1977-05-01), O'Dea
patent: 4292480 (1981-09-01), Sweatt
patent: 4575588 (1986-03-01), Vande Vyver

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