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Call control system for a subscriber transmission device

  • US 6,041,052 A
  • Filed: 02/03/1997
  • Issued: 03/21/2000
  • Est. Priority Date: 02/02/1996
  • Status: Expired due to Fees
First Claim
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1. A call control system for use in a subscriber transmission device located along a transmission path between subscribers and exchanges for performing upon requests from the exchanges, connection and disconnection of the subscribers with the transmission path, the call control system comprising:

  • plural call control message terminal sections, each provided for one of different protocols, each supported by one of groups of exchanges, for terminating a data link for sending and receiving a call control message to and from a corresponding exchange; and

    a call change data processor for detecting call and clearance by a subscriber, and for requesting one of the plural call control message terminal sections, which is provided for a protocol supported by a group of exchanges to one of which the subscriber is connected, to transmit detected contents of the call and clearance to the corresponding exchange.

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