Call control method, non-transitory computer-readable recording medium, and call control system

A non-transitory computer-readable recording medium having stored therein a program for causing a computer to execute a process, the process comprising:

• generating an identifier of a group call when an operation terminal of a user who has a conversation with a plurality of conversation partners is instructed to generate a group in which the plurality of conversation partners are designated;
• notifying a management server of the group call of the identifier when start of the group call is instructed;
• transmitting the identifier and a first call of a first conversation partner to a first terminal of the first conversation partner belonging to the plurality of conversation partners;
• displaying a call screen of the group call on the operation terminal and transmitting the identifier and a second call of a second conversation partner to a second terminal of the second conversation partner belonging to the plurality of conversation partners when participation of the first conversation partner in the group call by a response operation of the first conversation partner to a first incoming call screen displayed on the first terminal based on incoming call of the identifier and the first call is notified from the management server;
• and
• updating the call screen when participation of the second conversation partner in the group call by a response operation of the second conversation partner to a second incoming call screen displayed on the second terminal based on incoming call of the identifier and the second call is notified from the management server.

A call control system comprising:

• a receiver that receives an identifier of a group call from an operation terminal of a user who has a conversation with a plurality of conversation partners when the identifier is notified by an instruction of start of the group call, the identifier being generated by an instruction to the operation terminal of generation of a group in which the plurality of conversation partners are designated;
• a generator that generates information for managing the group call based on the identifier;
• a first notifier that notifies the operation terminal of participation of a first conversation partner in the group call when the participation of the first conversation partner in the group call is notified from a first terminal of the first conversation partner based on a first incoming call of the first terminal of the first conversation partner to the identifier transmitted from the operation terminal with display of a call screen of the group call in the operation terminal and a first call of the first conversation partner belonging to the plurality of conversation partners, and a response operation of the first conversation partner on a first incoming call screen displayed based on the first incoming call;
• and
• a second notifier that notifies the operation terminal of participation of a second conversation partner in the group call when the participation of the second conversation partner in the group call is notified from a second terminal of the second conversation partner based on a second incoming call of the second terminal of the second conversation partner to the identifier transmitted from the operation terminal with update of the call screen in the operation terminal and a second call of the second conversation partner belonging to the plurality of conversation partners, and a response operation of the second conversation partner on a second incoming call screen displayed based on the second incoming call.