Telephonic communications – Centralized switching system – Switching controlled in response to called station...
Patent
1984-07-26
1986-12-30
Brown, Thomas W.
Telephonic communications
Centralized switching system
Switching controlled in response to called station...
379294, 379296, 379299, H04Q 302
Patent
active
046330429
ABSTRACT:
An improved step-by-step switch assembly includes an electronic controller conversion module. A programmed microprocessor responds to incoming pulse trains of widely variant make and break ratios and generates precisely timed and shaped pulses to operate vertical, rotary and release magnets of the switch assembly. Other features include increased loop sensitivity, selective digit absorption and automatic periodic contact wiping to clean all of the contacts of the assembly.
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"The Regenerator 5A--A Microelectronic Project for Strowger Exchanges", Lock et al., Post Off. Electr. Eng. J., (Great Britain), vol. 71 (Oct. 1978), pp. 181-188.
D. Talley, Basic Telephone Switching Systems, Hayden Book Co., Inc., Rochelle Park, New Jersey (1979), Chapter 7, pp. 85-102.
Fields Gary C.
Stamos Mark E.
Brown Thomas W.
Electrotel, Inc.
Harrison David B.
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