| 摘要 |
PURPOSE:To attain a private mobile telephone system at low cost by adding a means to a connection device to transfer the calls received from a subscriber circuit to another connection device via a public telephone network. CONSTITUTION:Each of connection devices 3A and 3B contains a means to transfer the calls received from the subscriber circuits 2A and 2B to other devices 3A and 3B via a public telephone network, respectively. Thus the devices 3A and 3B transfer the received calls to other devices 3A and 3B via the network 1 in the case of a mobile machine 6 of the incoming destination is not present in any radio zone of a base station which is under its own control. As a result, no remodeling is required at all for the relay switchboards included in the network 1. Thus a private mobile communication system is obtained at a low cost. |
