Management device, communication system, and storage medium

A communication system comprising:

• a plurality of terminals;
• and
• a management device, wherein
• the management device includes
• a status management part configured to manage connection statuses of the terminals representing whether the terminals are ready to connect to other terminals;
• a group management part configured to manage a group associated with one or more of the terminals, and manages a group status of the group depending on the connection statuses of the terminals associated with the group, wherein when the connection status of at least one of the terminals associated with the group represents that the terminal is ready to connect to other terminals, the group management part updates the group status so that the group status represents that the group is ready to connect;
• a transmission part configured to transmit to a first terminal which is not associated with the group the group status representing that the group is ready to connect;
• an establishment part configured to, responding to a request to connect to the group from the first terminal, establish a session to connect the first terminal to a second terminal which is one of the terminals associated with the group, wherein the connection status of the second terminal represents that the second terminal is ready to connect to other terminals, and
• one of the terminals includes
• a receipt part configured to receive the group status from the management device;
• an acceptance part configured to accept user input to specify the group for transmitting the request to connect to the group;
• and
• a transmitting part configured to transmit the request to connect to the group to the management device.

A non-transitory computer-readable storage medium for storing a program therein, the program causing a computer to perform a method comprising:

• managing connection statuses of terminals representing whether the terminals are ready to connect to other terminals;
• managing a group associated with one or more of the terminals;
• acquiring the connection statuses of the terminals associated with the group;
• managing a group status of the group depending on the connection statuses of the terminals associated with the group, wherein when the connection status of at least one of the terminals associated with the group represents that the terminal is ready to connect to other terminals, the group management part updates the group status so that the group status represents that the group is ready to connect;
• transmitting to a first terminal which is not associated with the group the group status representing that the group is ready to connect;
• responding to a request to connect to the group from the first terminal, establishing a session to connect the first terminal to a second terminal which is one of the terminals associated with the group, wherein the connection status of the second terminal represents that the second terminal is ready to connect to other terminals.