| 摘要 |
An intercom apparatus has a main line connecting intercom master stations in respective residential rooms. Each master station has a terminal unit which is separate from and removable from the master station, so that the terminal unit can be removed according to need while keeping the connection. The intercom apparatus further has an entrance substation by which the master stations in residential rooms may be called from the entrance substation through the main line for bilateral communication. The terminal unit has terminals for connecting with intercom master stations by a station-to-station spanning wiring forming the main line and a terminal board on which the terminals are mounted for electrical connection with the main line path. A mounting bracket, by which the terminal unit is detachably mounted, is provided in a space which is formed in the backside of the intercom master station.
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