Control system, communications terminal, communications system, control method, and recording medium

A control system comprising:

• a receiver configured to receive information relating to starting or ending a call between a first communications terminal and a second communications terminal while a session, which is for sending content data between the first communications terminal and the second communications terminal, is established;
• a transmitter configured to
• send, to the first communications terminal, control information for starting output of content based on content data sent from the second communications terminal, in response to receiving the information relating to starting the call by the receiver, and to
• send, to the first communications terminal, the control information for stopping output of the content based on the content data sent from the second communications terminal, in response to receiving the information relating to ending the call by the receiver;
• and
• state information manager circuitry to manage state information indicating a state of the second communications terminal,
• wherein the transmitter does not send, to the first communications terminal, the control information for starting output of the content based on the content data sent from the second communications terminal, in a case where the state information, which is managed by the state information manager, indicates call in progress.