Abstract: Each of a plurality of mobile stations is provided with a plurality of extension numbers including at least one unique extension number, and different lines are set for the plurality of extension numbers respectively. This enables a call using a line even when another call is made using another line.

Abstract: When a radio terminal communicating with a fixed terminal moves out of a service area of one of radio base stations, a connection to the fixed terminal is switched to a connection to another fixed terminal device such as a voice mail device, which is preliminarily assigned by the radio terminal, to realize a call connection of the fixed terminal to thereby make an indirect communication between the radio terminal and the another fixed terminal.

Abstract: An IP network system and an H.323 gatekeeper for easily performing voice communication between an existing system such as an IP-PBX system not employing the H.323 protocol and a system employing the H.323 protocol. There are connected an H.323 gatekeeper, H.323 terminal, an IP-PBX and an IP component to an IP network. The H.323 gatekeeper installs therein a software to perform protocol conversion between the PHS protocol and the H.323 protocol. Accordingly, voice communication between the H.323 terminal and the IP component can be realized.

Abstract: In a radio terminal operation data write method in a private mobile communication system including a multi-node PBX having a plurality of node exchanges connected to each other through a high-speed data line, a node exchange to which a maintenance terminal is connected specifies a registration node exchange of a radio terminal from a logical extension number which is unique within the multi-node PBX and added to the radio terminal, acquires information on a current location area node exchange of the radio terminal through the high-speed data line, and requests the current location area node exchange to write terminal operation data on the radio terminal. The current location area node exchange acquires termination operation data on the radio terminal from the registration node exchange through the high-speed data line in accordance with the logical extension number and writes the terminal operation data.

Abstract: When a radio terminal communicating with a fixed terminal moves out of a service area of one of radio base stations, a connection to the fixed terminal is switched to a connection to another fixed terminal device such as a voice mail device, which is preliminarily assigned by the radio terminal, to realize a call connection of the fixed terminal to thereby make an indirect communication between the radio terminal and the another fixed terminal.

Abstract: A radio switching equipment includes circuit correspondence storage portion for storing a plurality of mobile terminal numbers with respective correspondence with a circuit number of each trunk circuit, circuit control portion for reading out the mobile terminal number corresponding to the circuit number of the trunk circuit or reading out the circuit number of the trunk circuit corresponding to the mobile terminal number, on the basis of a storage content of the circuit correspondence storage portion when call is received from the trunk circuit or when call is made from the mobile terminal, and requesting call processing, call processing portion for receiving the request of the call processing from the circuit control portion and establishing connection between the mobile terminal identified by the mobile terminal number and the trunk circuit identified by the circuit number, and varying portion for varying correspondence between the circuit number of the trunk circuit and the mobile terminal number of the m