Patent ID: 7489900

Claim:
A communication system having an infrared communication capability and a wireless data communication capability, comprising: a first terminal for storing provisional setting information for wireless data communication containing identification information of said first terminal, the provisional setting information including antenna level control information; and a second terminal having said infrared communication capability and said wireless data communication; wherein said provisional setting information is transmitted from said first terminal to said second terminal by said infrared communication capability, said second terminal generates first setting information with said first terminal specified as a destination of connection on the basis of said received provisional setting information, said second terminal makes wireless data communication with said first terminal on the basis of said first setting information and, if said wireless data communication is successful, transmits a connection completion notice to said first terminal, and said first terminal, having received said connection completion notice, updates said provisional setting information to generate second setting information with said second terminal specified as a destination of connection, thereby establishing wireless data communication between said first terminal and said second terminal, and said first terminal having not received said connection completion notice within a time frame, suspends a wait state and reduces the use of standby power.