Abstract:
PURPOSE: An intercommunication device for a helicopter supporting a backup mode is provided to relay internal communications and external communications through analogue communication data by using the backup relay unit of a communication repeater even during a backup mode. CONSTITUTION: A plurality of user terminals (210, 220, 230) communicate with the inside or outside. A communication repeater (300) is connected to each user terminal. The communication repeater relays a signal from each user terminal to the inside or outside. Each of walkie-talkies (510, 520) is connected to the communication repeater, and communicates a signal from the communication repeater with the outside. An external control center (100) is wirelessly connected to the walkie-talkies, and transmits or receives a signal from or to each walkie-talkies. [Reference numerals] (100) External control center; (210) User terminal 1; (220) User terminal 2; (230) User terminal 3; (300) Communication repeater; (510) Walkie-talkie 1; (520) Walkie-talkie 2
Abstract:
PURPOSE: A star-type intercommunication apparatus for a helicopter is provided to allow user terminals to perform internal communications and external communications even when there exist a malfunctioning user terminal among a plurality of user terminals. CONSTITUTION: A communication repeater (220) is connected with a plurality of user terminals so as to relay signals from the plurality of user terminal for internal or external communications. A walkie-talkie (230) is connected with the communication repeater so as to transmit or receive the signals from the communication repeater to or from the outside. An external control center (100) connected with the walkie-talkie wirelessly so as to transmit or receive the signals from the walkie-talkie. [Reference numerals] (100) External control center; (211) User terminal 1; (212) User terminal 2; (213) User terminal 3; (220) Communication repeater; (230) Walkie-talkie