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:
Dec. 26, 1995
Filed:
May. 31, 1994
Sandip Mukerjee, Jackson, NJ (US);
Ralph Utano, Fairhaven, NJ (US);
AT&T Corp., Murray Hill, NJ (US);
Abstract
The lack of uniformity for accessing wireless carriers to reach roaming wireless telephones prevents nationwide wireless telephone service from being provided in a seamless manner by an automated system that accesses the roamer access ports to connect a caller to a wireless telephone station in a manner such that the roaming nature of the called wireless telephone station is transparent to the caller. This problem is overcome, by a method for placing a telephone call to a wireless telephone station, method including the steps of: a) storing in a data base an association between respective (i) roamer access ports, (ii) mobile switching centers and (iii) one of a predetermined set of instructions, i.e., rules, which are executed by the machine in order to access wireless telephone service at mobile switching centers: b) receiving an indication of the particular mobile switching center presently serving the wireless telephone station; c) looking up the indication in the data base to retrieve (i) a particular roamer access port associated with the particular mobile switching center serving the wireless telephone at the location and (ii) a rule to access wireless telephone service at the mobile switching center via the roamer access port associated with the mobile switching center; d) placing a call to the roamer access port; and e) executing the instructions of the retrieved rule for the roamer access port so as to cause the mobile switching center to attempt to establish a connection to the wireless telephone station.