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:
Jun. 01, 2010
Filed:
Jul. 20, 2007
Ben-ren Chen, Northboro, MA (US);
Robert Martin Ephraim, Bridgewater, NJ (US);
Ben-Ren Chen, Northboro, MA (US);
Robert Martin Ephraim, Bridgewater, NJ (US);
Cello Partnership, Basking Ridge, NJ (US);
Abstract
Prepaid PTT service calls through a switched mobile communication network may originate at off-net roaming locations. A flag is set in a mobile telephone station indicating that the mobile station is that of a prepaid subscriber, to set a PTT client program to its 'prepaid mode.' When the prepaid mobile station initiates a PTT call while roaming off-net, the call is directed to a prepaid server, and the PTT client program assists the subscriber to re-enter the called number when the prepaid server prompts the subscriber to do so. The call can then be extended from the prepaid server platform to a PTT switch for establishing communication with one or more selected contacts in a contact list, based on translation of the contact number to one or more destination telephone numbers for the called contact(s).