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:
Apr. 28, 2009
Filed:
Oct. 30, 2002
Yi Zhang, Austin, TX (US);
Yi Zhang, Austin, TX (US);
SBC Properties, L.P., Reno, NV (US);
Abstract
A calling card system includes a public switched telephone network (PSTN) and a service selection gateway. The PSTN may receive calls from communication devices that may be either voice communication or data communication. The calls may be forwarded to the service selection gateway based on a calling card access number that is included in the call. Calls that are voice communication may be transferred to the PSTN or to a public network by the service selection gateway. The service selection gateway may provide voice communication transferred to the public network in a voice based network protocol such as VoIP that is transmittable over the public network. Calls that are data communication may be selectively transmitted over the public network in a data network protocol with the service selection gateway.