A communication control system, comprising: a communication management system; and one or more relay devices (2a, 2b,...) configured to communicate with the communication management system through a network, wherein the communication management system includes: a communication management system memory configured to store, for each one of one or more relay devices (2a, 2b,...), relay device identification information for identifying a relay device (2a, 2b,...) capable of communicating with a communication terminal (4a, 4b,...) using a first communications protocol, in association with configuration data that allows the communication terminal (4a, 4b,...) to communicate using a second communications protocol, and each one of one or more relay devices (2a, 2b,...) includes: a relay device memory configured to store relay device identification information for identifying the relay device (2a, 2b,...); a transmitter configured to transmit the relay device identification information obtained from the relay device memory to the communication management system using the first communications protocol (Cpl), in response to a configuration data request received from a communication terminal (4a, 4b,...) using the first communications protocol; and a receiver configured to receive configuration data associated with the relay device identification information from the communication management system, wherein the transmitter is further configured to transmit the configuration data received from the communication management system to the communication terminal (4a, 4b,...) as a response to the configuration data request using the first communications protocol, the configuration data allowing the communication terminal (4a, 4b,...) to communicate with a counterpart apparatus using the second communications protocol. a communication management system; and one or more relay devices (2a, 2b,...) configured to communicate with the communication management system through a network, wherein the communication management system includes: a communication management system memory configured to store, for each one of one or more relay devices (2a, 2b,...), relay device identification information for identifying a relay device (2a, 2b,...) capable of communicating with a communication terminal (4a, 4b,...) using a first communications protocol, in association with configuration data that allows the communication terminal (4a, 4b,...) to communicate using a second communications protocol, and each one of one or more relay devices (2a, 2b,...) includes: a relay device memory configured to store relay device identification information for identifying the relay device (2a, 2b,...); a transmitter configured to transmit the relay device identification information obtained from the relay device memory to the communication management system using the first communications protocol (Cpl), in response to a configuration data request received from a communication terminal (4a, 4b,...) using the first communications protocol; and a receiver configured to receive configuration data associated with the relay device identification information from the communication management system, wherein the transmitter is further configured to transmit the configuration data received from the communication management system to the communication terminal (4a, 4b,...) as a response to the configuration data request using the first communications protocol, the configuration data allowing the communication terminal (4a, 4b,...) to communicate with a counterpart apparatus using the second communications protocol. a relay device memory configured to store relay device identification information for identifying the relay device (2a, 2b,...); a transmitter configured to transmit the relay device identification information obtained from the relay device memory to the communication management system using the first communications protocol (Cpl), in response to a configuration data request received from a communication terminal (4a, 4b,...) using the first communications protocol; and a receiver configured to receive configuration data associated with the relay device identification information from the communication management system, wherein the transmitter is further configured to transmit the configuration data received from the communication management system to the communication terminal (4a, 4b,...) as a response to the configuration data request using the first communications protocol, the configuration data allowing the communication terminal (4a, 4b,...) to communicate with a counterpart apparatus using the second communications protocol.