| 摘要 |
PROBLEM TO BE SOLVED: To provide an analog cordless telephone device which can make a two-way general calling between a master device and slave devices. SOLUTION: When a general calling button of one of the slave devices is pressed, communication is started between the master device and the slave device using a control CH, and a conversation channel is constructed by a first transmitting and receiving unit using a first communication channel which consists of a first transmission channel and a first reception channel, Through a second transmitting and receiving unit, the master device requests the other slave devices to make a general calling, and constructs a conversation channel between the master device and the other slave devices using a second communication channel which consists of a second transmission channel and a second reception channel, When the other slave devices respond to the general calling from the slave device, the slave devices makes an extension-to-extension call through the master device, using the first and second communication channels.
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