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Time-multiplex programmable switching apparatus

  • US 4,061,880 A
  • Filed: 03/21/1975
  • Issued: 12/06/1977
  • Est. Priority Date: 03/21/1975
  • Status: Expired due to Term
First Claim
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1. In a telephone system, digital time-multiplex programmable switching apparatus for establishing on demand, time shared connections between pairs of ports comprisinga plurality of port means, each of said port means having a unique address, said port means including means for generating predetermined digital signaling signals in response to particular conditions at said port means and said port means further including means for generating digital information signals in response to an applied information signal,central processor unit means including memory means having a plurality of recirculating slots including slots for storing pairs of port means addresses and information signals directed to said addresses and means responsive to said signaling signals for inserting in said memory means slots pairs of port means addresses to establish time-multiplex information exchanging connections between said pairs of port means and means responsive to the sequential occurrence of port means addresses in said memory means slots for simultaneously sending digital information stored with each of said port means addresses in said memory means slots to said addressed port means and for receiving digital information from said addressed port means, andcommon bus means interconnecting all of said plurality of port means and said central processor means.

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