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Communication terminal

  • US 20040049551A1
  • Filed: 09/04/2003
  • Published: 03/11/2004
  • Est. Priority Date: 09/05/2002
  • Status: Active Grant
First Claim
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1. A communication terminal that is connected to a public line network, for communicating with a center apparatus connected to the public line network to send and receive short message data to/from another communication terminal via the center apparatus, the communication terminal comprising:

  • a master unit; and

    a slave unit for mutual wireless communications with the master unit, the slave unit including;

    slave unit side input means for inputting short message data, and slave unit side wireless communicating means for sending the short message data inputted with the slave unit side input means and for receiving short message data from the master unit, the master unit including;

    master unit side input means for inputting short message data, and master unit side communicating means that is connected to a public line network, for sending and receiving short message data to/from the center apparatus, master unit side wireless communicating means for sending short message data received by the communicating means to the slave unit and receiving short message data from the slave unit, storing means for storing a plurality types of communication protocol information, each of which corresponds to a center apparatus, to be used for communications of the communication means, selecting means for selecting a center apparatus to be communicated with among the center apparatuses whose communication protocol information is stored, based on a predetermined condition, and controlling means for controlling the communicating means so as to send short message data inputted with the master unit side input means or short message data received by the master unit side wireless communicating means to the center apparatus when sending the short message data, and to receive short message data from the center apparatus when receiving the short message data, based on the communication protocol information of the center apparatus selected by the selecting means, and for determining whether or not the short message data received from the center apparatus is addressed to the slave unit, and when the short message data is determined as being addressed to the slave unit, controlling the master unit side wireless communicating means so as to send the received short message data to the slave unit.

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