×

Method and apparatus for presence indication of cellular telephones

  • US 7,840,212 B2
  • Filed: 04/21/2006
  • Issued: 11/23/2010
  • Est. Priority Date: 04/21/2006
  • Status: Active Grant
First Claim
Patent Images

1. A telecommunications system, comprising:

  • a plurality of cellular telephone networks; and

    a presence server configured to receive cellular telephone network registration information from presence clients and provide cellular telephone network identification indicia to others of said presence clients, wherein each presence client being provided said indicia for one or more other said presence clients is provided with an indication whether each said one or more other presence clients is on the same cellular telephone network prior to calling each other one or more other presence client.

View all claims
  • 12 Assignments
Timeline View
Assignment View
    ×
    ×