| 摘要 |
PROBLEM TO BE SOLVED: To provide a database system, data management system, portable communication terminal and method capable of easily realizing and managing information message service hard to be expressed by a prescribed format, e.g. voice information (hereinafter, it is referred to as voice information), and apt to use for both an information service company for providing a service and users who receives it service by utilizing a wireless communication system such as a paging system or the like. SOLUTION: In a paging communication system, a service center 4 having a voice information service function is newly provided. In this voice information service function, voice information of 'I will sell' or 'I will buy' on a ticket by artist is exchangeable between pagers 6 and 6' via the service center 4, so that sale information on tickets by artist is simply exchanged between the pagers 6 and 6'.
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