Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent
1994-11-17
1998-08-18
Zele, Krista
Telephonic communications
Supervisory or control line signaling
Using line or loop condition detection
379377, 379382, 379413, H04M 100
Patent
active
057968179
ABSTRACT:
A hybrid circuit for an electric operating and scanning interface is especially applicable to electronic recorders of electromechanical telephone stations. The hybrid circuit controls voltage and current parameters on different elements of the station in different situations. The hybrid circuit scans the condition of telephone station elements controlled by it, and programmably applies and receives current and voltage to and from the telephone station elements on which it acts.
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Perez Roldan Luis
Pozas Alvarez Jose Antonio
Saint-Surin Jacques M.
Telefonica de Espana S.A.
Zele Krista
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