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:
Sep. 23, 2003
Filed:
Aug. 21, 1997
International Mobile Satellite Organization, London, GB;
Abstract
A method and apparatus are disclosed for a system where a user terminal can communicate with satellites A-C, the satellites A-C can communicate with earth stations A-E which in turn can communicate with the terrestrial telephone system . The user terminal can register with one of the earth stations C which has an associated mobile satellite switching center C which acts as a gateway into the terrestrial system . When attempting to contact the user terminal from the terrestrial system the mobile satellite switching center C of visitor registration, if it cannot make the contact itself, instructs other earth stations , in turn, according to different methods of alternative earth station selection, until contact is made, and then routes all voice messages through itself C to retain the single and original gateway into the terrestrial system