Title:
TELECOMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP2008211851
Kind Code:
A
Abstract:
To provide an SIM card which is effective and can remotely be reconfigured.
In a telecommunications system such as a global mobile telephone network in which each subscriber unit includes a Subscriber Identity Module (SIM card), each SIM card has fixed memory locations (22), to which data can be addressed over the air. Some of the locations (22) cannot be overwritten from the subscriber unit but can be accessed therefrom on the entry of short simple codes each associated with one of the locations. Further fixed memory locations (24) can be read over the air only when the subscriber enters a personal identification number. Locking control files (27, 28) are used to control read/write access to the locations (22, 24), respectively.
Inventors:
MICHAELS WAYNE DAVID
TIMSON ANTHONY RICHARD
DERVAN ADEN WILLIAM
TIMSON ANTHONY RICHARD
DERVAN ADEN WILLIAM
Application Number:
JP2008145822A
Publication Date:
September 11, 2008
Filing Date:
June 03, 2008
Export Citation:
Assignee:
BRITISH TECH GROUP INT
International Classes:
H04M11/00; H04W84/08; G06Q20/34; G06Q20/36; G07F7/08; G07F7/10; H04M1/00; H04M3/493; H04W4/06; H04W4/14; H04W8/24
Domestic Patent References:
| JPH05130255A | 1993-05-25 |
Foreign References:
| WO1992014329A1 | 1992-08-20 |
Attorney, Agent or Firm:
Okada International Patent Office