| 摘要 |
<p>Ineffective traffics are reduced when a mobile data communication system including a communication terminal connected to data terminal makes a general calling. In order to reduce ineffective traffics, the communication terminal is provided with an informing means (204) which recognizes the used state of the communication terminal and the data terminals (1031)-(103n) and informs the network system of the recognition results. The network system has a storing means (303) in which a communication terminal side of which the terminal (102) and at least one of the data terminals (1031) to (103n) become in usable states is registered and from which a communication terminal side of which the terminal (102) or all of the data terminals (1031) to (103n) become in nonusable states is deleted so as to register in advance that the terminal (103) is in a receivable state in the network system (101) side. In addition, incoming call waiting states are classified into a voice-only waiting state and a voice-and-packet waiting state. Communication means (301) executes a voice general calling when the incoming call waiting state is the former or a packet general calling when the waiting state is the latter.</p> |
