The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2009
Filed:
Jul. 13, 2005
Thomas Charles Nagy, Waterloo, CA;
Frederick Chee-kiong Lai, Waterloo, CA;
Thomas Charles Nagy, Waterloo, CA;
Frederick Chee-Kiong Lai, Waterloo, CA;
Research In Motion Limited, Waterloo, Ontario, CA;
Abstract
A mobile communication device includes a wireless transceiver, one or more processors coupled to the wireless transceiver, memory, and a communications application stored in the memory. The communications application may be a VoIP telephony application which involves communication in accordance with a session initiation protocol (SIP). The one or more processors are operative to receive a public IP address assigned to the mobile device in a public network; cause a request for a virtual private network (VPN) connection with a private network to be communicated; refrain from registering with a SIP server for the communications using the public IP address; and if the VPN connection is established: receive a private IP address assigned to the mobile device for the VPN connection and cause a request for session registration using the private IP address to be communicated to a SIP server of the private network.