Ringing interface card for telephone test equipment

Details Ringing interface card for telephone test equipment Ringing interface card for telephone test equipment

1985-03-25

1987-03-03

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

379 25, H04M 330

Patent

active

046477241

ABSTRACT:
The present invention is directed toward a new type of ringing interface card which overcomes the inability of known cards for testing multi-party service and which enable a technician to measure the ringing frequency and simultaneously to detect which of the tip and ring conductors receives the ringing signal.

REFERENCES:
patent: 4544809 (1985-10-01), Stupoints et al.

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