Abstract: An object is to provide a telephone enabling a user of a telephone to readily recognize which telephone user is a source of voice under transmission. This telephone 10 has a receiver 102 for receiving telephone information to specify each of an authorized telephone and unauthorized telephones, a display surface 100 for displaying predetermined information based on the received telephone information, and a display control part 105 for specifying a content of the predetermined information, based on the telephone information received by the receiver 102, and for displaying the content on the display surface 100.

Abstract: An object of the present invention is to be able to rejoin a group call by spontaneous operation from the terminal side at an optional timing. The group call server provides a plurality of mobile communications terminals with a function of a group call between the terminals through a communications network, and comprises: an ID granting unit that grants the group call to be established a call ID that identifies the group call; an ID notification unit that gives the terminals participating in the group call to be established the call ID granted to the group call by the ID granting unit; a rejoin request receiving unit that receives requests to rejoin the group call that have been transmitted from a terminal disconnected from the group call and that include the call ID; and a rejoin control unit that allows the terminal that transmitted the request to rejoin the group call related to the call ID included in the rejoin request received by the rejoin request receiving unit.

Abstract: An object is to provide a telephone enabling a user of a telephone to readily recognize which telephone user is a source of voice under transmission. This telephone 10 has a receiver 102 for receiving telephone information to specify each of an authorized telephone and unauthorized telephones, a display surface 100 for displaying predetermined information based on the received telephone information, and a display control part 105 for specifying a content of the predetermined information, based on the telephone information received by the receiver 102, and for displaying the content on the display surface 100.

Abstract: A mobile communications service control apparatus comprises signal processing means for conducting prescribed signal processing of a packet transmitted from a mobile terminal or preset communications-equipment, information restoring means for restoring information of a layer higher than a transmitted layer of the signal-processed packet, and service providing means for providing a service in accordance with the contents of the restored information.