Patent ID: 7437413

Claim:
A text messaging system including a plurality of information terminals provided with communications parts, and servers connected to the information terminals via communication lines responsive to the communication parts, the text messaging system comprising: a plurality of transmitters having different transmission modes and one of the transmitters provided in each of the information terminals for transmitting to the servers text messages addressed to other of the information terminals; a receiver provided in the information terminals for receiving from the servers a text message from other of the information terminals; a status detector provided in the information terminals for detecting and reporting to the servers an operational status of each of the transmitters including at least a change of status of the connection with the communication lines; a receiver provided in the servers for receiving text messages from any one of the information terminals; a status administrator provided in the servers for storing, per user of any one of the information terminals, the operational status, including the change of status, of each of the transmitters means of each information terminal reported from said status detector; a selector provided in the servers for referring to the operational status, including the change of status, stored by the status administrator of an information terminal that is selecting a message destination and a transmitter and transmission mode for the received text messages according to the stored operational status and change of status; and a transmitter provided in the servers for transmitting text messages received from the information terminals to the destination information terminal according to the dynamically selected transmission mode using the dynamically selected transmitter.