| 摘要 |
PURPOSE:To attain the extension of a radio channel with a simpler connection work than the case with the connection work when a radio master station is extended in a master set by connecting a connection use radio set to the master set in place of a wired telephone set and extending the radio master station. CONSTITUTION:When a cordless telephone slave set 30a is in the trunk line busy state through a radio master station 121 and a telephone line 31 and a cordless telephone slave set 306 is in the trunk line busy state through a radio station 122 and a telephone line 32, and when the slave set 30b holds a trunk line and makes transfer call talking to a cordless slave set 30n, the cordless telephone slave set 30b holds the operation and enters an extension number corresponding to a cordless telephone slave set 30n. A master station 122 receives the hold control information and extension number information and sends them to a control circuit 17. The circuit 17 makes trunk line holding and sends extension number information from a data transmission/ reception circuit 16 to the connection use radio equipment 20. The equipment 20 uses a data transmission/reception circuit 24 to receive the information and a control circuit 23 controls a radio transmission/reception circuit 22, the slave set 30a is called and the radio talking channel is established by the reply of the slave set 30n.
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