Telephonic communications – Supervisory or control line signaling – Signal reception at substation
Patent
1994-11-28
1997-09-30
Zele, Krista M.
Telephonic communications
Supervisory or control line signaling
Signal reception at substation
379100, 379372, 379418, H04M 100
Patent
active
056733135
ABSTRACT:
A telephone set using two or more telephone numbers called by respective call signals having different patterns, which are stored in a pattern data memory when the call signals are received and detected in a registering mode and with which the pattern of a call signal received when the telephone set is not in the registering mode is compared to determine the telephone number being called. The registering mode is established by an operator-controlled data input device. The patterns of the call signals are detected by a pattern detector in the registering mode, and the detected patterns are registered in the pattern data memory, so that the telephone number called by each call signal is determined by a pattern determining device as a result of comparison of the pattern of each call signal with the registered patterns in the pattern data memory. The telephone set preferably has an indicator for indicating on and off patterns of the call signals stored in a temporary memory.
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Brother Kogyo Kabushiki Kaisha
Weaver Scott L.
Zele Krista M.
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