| 摘要 |
PURPOSE:To set all radio wave arrival range of a base station to be a zone by allowing a slave set to receive an incoming call even when the position registration of the slave set is lost with respect to the incoming call system to the cordless handset used for an extension of a private branch of exchange. CONSTITUTION:The system is provided with a private branch of exchange 1 accommodating base stations 2-i arranged decentralizingly to plural locations and able to control a cordless handset 5-i able to be talking from the base stations 2-i via a radio line, and the priority with the cordless handset 5-i is registered to the base stations 2-i and the base stations 2-i are selected according to the priority at the arrival of a call to the cordless handset 5-i and the cordless handset 5-i is searched and called. |
