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Modem communications interoperability with services equipped to provide calling party identity delivery with call waiting

  • US 5,550,908 A
  • Filed: 06/01/1995
  • Issued: 08/27/1996
  • Est. Priority Date: 06/01/1995
  • Status: Expired due to Fees
First Claim
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1. A method of providing interoperability between a first modem and a caller identity delivery on call waiting (CIDCW) service that operates when a communications link is established between the first modem and a remote modem, the CIDCW service, upon receiving an incoming call from a third party and directed to the first modem, sending the first modem a first alerting signal sequence including a first portion indicative of the existence of an incoming telephone call from the third party;

  • and, if the first modem responds to the first portion with an acknowledgment signal, the first alerting signal sequence further including a second portion specifying the identity of the third party caller;

    the CIDCW service sending the first modem a second alerting signal sequence including a first portion indicative of the existence of the incoming telephone call from the third party;

    and, if the first modem responds to the first portion of the second alerting signal sequence with an acknowledgment signal, the second alerting signal sequence further including a second portion specifying the identity of the third party caller;

    THE METHOD CHARACTERIZED BY THE FOLLOWING STEPS;

    (a) the first modem, upon receipt of the first portion of the first alerting signal sequence, not sending an acknowledgment signal to the CIDCW service; and

    (b) the first modem, upon receipt of the first portion of the second alerting signal sequence, sending an acknowledgment signal to the CIDCW service.

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