| 摘要 |
PURPOSE:To attain communication only with a main communication equipment at the time of carrying by performing the communication by the cellular system only with the main communication equipment suitable for the carrying. CONSTITUTION:The equipment consists of a portable main communication equipment 10 in which communication is performed by the cellular system and a sub communication equipment 30 connecting to the main communication equipment 10, the communication by the sub communication equipment 30 is performed by the control from the main communication equipment 10 and the communication by the sub communication equipment 30 based on the control from the master communication equipment 10 is performed by a communication system different from the cellular system applied to the main communication equipment 10. In this case, the communication is performed by the analog cellular system by the transmission of analog data in the main communication equipment 10 and the communication is performed by the digital cellular system of the transmission of digital data with the sub communication equipment 30. Thus, the communication by a prescribed cellular system is performed only by the main communication equipment 10 and when the master communication equipment and the sub communication equipment 30 are connected, the communication by the other communication system is attained. |
