| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication system and a communication device that improve convenience at a time of registering identification information in a system that uses a communication device, such as a telephone set, and a first mobile terminal device and second mobile terminal device capable of short-range radio communication and long-distance radio communication with the communication device, and notifies, for example, the first mobile terminal device that a user went out forgetting to carry the second mobile terminal device with them if the user did so.SOLUTION: If a communication device 1 is disconnected during short-distance communication with a first mobile terminal device 2 (S102: YES) and determines that it can perform long-distance communication with the first mobile terminal device 2 (S103: YES), and determines that it can perform short-distance communication with a mobile terminal device 3 (S104: YES), the communication device 1 transmits an output instruction command to the first mobile terminal device 2 from a long distance radio communication unit 18 (S105). |
