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Circuit arrangement and method for multi-address switching operations

  • US 4,354,261 A
  • Filed: 03/10/1980
  • Issued: 10/12/1982
  • Est. Priority Date: 03/30/1979
  • Status: Expired due to Term
First Claim
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1. A circuit arrangement for multi-address switching operations of a message composed of digital encoded signals between a calling data terminal and a variety of called data terminals operating with different data transmission procedures including signalling, data format and data transmission rate, said circuit arrangement adapted for use with an electronic data switching system and comprising in combination:

  • (a) at least two interface circuits each having an external interface input, an external interface output, an internal interface input, an internal interface output and an interface control terminal, and each having input/output converting networks connected to said interface inputs and outputs, each of said external interface inputs being adapted for connection with respective output means of the electronic data switching system for receiving digital signals from one type of data terminal and each of said external interface outputs being adapted for connection with respective input means of the electronic data switching system for transmitting digital signals to said type of data terminal;

    (b) storage means for storing the message being sent from the calling data terminal and including data information to be transmitted and identification information of the called data terminals, said storage means having a storage input, a storage output and a storage control terminal, said internal interface input and said storage input being connected in parallel to said storage output and said internal interface output respectively; and

    (c) control means for controlling the input/output operations of said storage means such that said data information is sent out in sequence to each of the called data terminals one after another by means of a separate line connection across the respective interface circuit assigned to the currently called type of data terminal and with a data transmission procedure associated with the currently called type of data terminal.

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