Title:
TRANSMISSION SYSTEM HAVING TERMINAL EQUIPMENT PROVIDED WITH PREPAID CIRCUIT
Document Type and Number:
Japanese Patent JPH09233541
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a connectable circuit formed from an SIM card having no demerit that damage such as changing contents through illegal trick is easily received. SOLUTION: This transmission system has plural terminal equipments 1, 36 and 37 respectively provided with one connectable circuit 30 storing prepaid data at least. The terminal equipment 1, 36 and 37 is provided with a means for directly changing these prepaid data corresponding to communication. Further, a protecting means is provided for protecting these data concerning this prepaid state. Thus, a prepaid card can be used for a GSM network or any similar network.
Inventors:
SUTEFUAANU GASUPARINI
BERUNAARU GEFUROTAN
BERUNAARU GEFUROTAN
Application Number:
JP3049497A
Publication Date:
September 05, 1997
Filing Date:
February 14, 1997
Export Citation:
Assignee:
PHILIPS ELECTRONICS NV
International Classes:
H04W88/02; G06Q20/00; G07F7/08; H04M15/00; H04M17/00; H04W4/24; H04W8/18; (IPC1-7): H04Q7/38
Attorney, Agent or Firm:
Akihide Sugimura (3 others)
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