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:
Aug. 11, 2009
Filed:
Jul. 29, 2005
Steven Wesley Barrow, South Riding, VA (US);
Steven Wesley Barrow, South Riding, VA (US);
Nextel Communcations Inc., Reston, VA (US);
Abstract
A method and system for dispatch calling using personal telephone numbers (PTNs) are provided. In accordance with the method and system, when a dispatch user enters a PTN as part of a dispatch call initiation, the originating dispatch call controller recognizes that the dispatch call request includes a PTN. If the originating dispatch call controller does not have the target subscriber in its recent call record cache, the originating call controller determines which home location registers (HLRs) serve subscribers with the particular NPA and NXX of the PTN. The originating call controller sends a request for the UFMI of the target subscriber to each of the determined HLRs. When the originating call controller receives a response from one of the HLRs with the UFMI, the originating call controller completes the dispatch call using the received UFMI.