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Off-hook triggered cellular-landline conference call

  • US 8,254,897 B2
  • Filed: 10/17/2011
  • Issued: 08/28/2012
  • Est. Priority Date: 05/18/2007
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • a network switch detecting transition of a landline telephone from an on-hook state to an off-hook state at a time when a call is not being placed to the landline telephone;

    responsive to the detecting, determining by querying a subscription profile that is associated with the landline telephone that the subscription profile includes a subscription to a cellular-landline conference call service;

    responsive to the determining, making a determination of whether a cellular telephone is currently engaged in a call, by querying a call-state database to determine call-state of the cellular telephone; and

    responsive to the determination being that the cellular telephone is currently engaged in a call, engaging in a conferencing process to conference the landline telephone into the call.

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