Fixed installation unit of intercom system, intercom system, and intercom system

摘要

PROBLEM TO BE SOLVED: To enable a user interface of an intercom device to be simply and inexpensively exchanged.SOLUTION: A panel unit 12 to be attachable/detachable to/from a main body unit 11 includes a display part 122, a microphone 124, and a speaker 123. The main body unit 11 includes: a communication I/F 111 for receiving a first image signal and first voice signal transmitted from another intercom device; and a connection I/F 116 for outputting a second image signal that has been converted in order to output the first image signal received by the communication I/F 111 to the display part 122, outputting a second voice signal that has been converted in order to output the first voice signal received by the communication I/F 111 to the speaker 123, and receiving the input of a third voice signal that has been output from the microphone 124.SELECTED DRAWING: Figure 4