US006044263A [ii] Patent Number: 6,044,263  Date of Patent: Mar. 28,2000
 METHOD FOR PROVIDING A LOCATION
INDEPENDENT DIALING PROCEDURE
WITHIN A MOBILE
 Inventors: Eric Valentine, Piano; Vladimir
Alperovich, Dallas, both ol Tex.
 Assignee: Ericsson Inc., Research Triangle Park, N.C.
 Appl. No.: 08/768,523  Filed: Dec. 18, 1996
 Int. C I. II04Q 7/38
 U.S. CI 455/414; 455/419; 455/434;
 Field of Search 455/433, 551,
455/558, 419, 432, 435, 436, 517, 552, 434, 566, 456, 426, 414; 379/357
 References Cited
U.S. PATENT DOCUMENTS
A memory register correlating an access code for accessing a particular long distance carrier within a particular telecommunications network is coupled either to a mobile station or to a telecommunications node serving the mobile station. Whenever the mobile station travels outside of its home Public Land Mobile Network (PLMN) and dials an access code in an attempt to access that particular long distance carrier, an application module associated with the mobile station or the telecommunications node automatically determines the current network serving the mobile station and converts the dialed access code to another access code appropriate for accessing the desired long distance carrier within the current PLMN. A call connection, thereafter, is established with the indicated long distance carrier utilizing the converted access code.
22 Claims, 8 Drawing Sheets