To provide a communication system where it is not required to introduce an exchange of a large scale more than a required scale and a phone call is made or received even during absence.

A radio base station 40 and a line controller 10 are connected to a network 70 and communication among plural mobile radio terminals 51 is attained via the radio base station 40. In the case that other terminal is connected to a network or a line terminal having an interface with an analog public network and/or ISDN is connected to the network, the radio base station 40, the line controller 10 and a line terminal make prescribed control so that the communication between the mobile radio terminal 51 and the terminal connected to the network via the analog public network and/or ISDN is attained.