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Transparent call discrimination (TCD) method and apparatus

  • US 5,974,130 A
  • Filed: 09/23/1997
  • Issued: 10/26/1999
  • Est. Priority Date: 09/23/1997
  • Status: Expired due to Fees
First Claim
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1. A method of transparent call discrimination comprising the steps of:

  • providing a call discrimination data message within a Caller ID message frame structure of an outgoing call from a call originating equipment, said Caller ID message frame structure having a single data message frame format, the single data message frame format characterized by a channel seizure frame, a mark signal frame, a message type frame, a first mark bits frame, a message length frame, a second mark bits frame, a message word frame, a more message word frame, a third mark bits frame, and a checksum frame;

    discriminating a type of call on an incoming telephone line of a call receiving equipment in response to the call discrimination message, wherein the type of call is discriminated prior to an occurrence of an OFF-HOOK state of the telephone line;

    activating an appropriate device of the call receiving equipment in response to the type of call in preparation for responding to the incoming call; and

    routing the incoming call to the appropriate device in response to the discriminated type of call at the occurrence of the OFF-HOOK state.

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