| 摘要 |
PROBLEM TO BE SOLVED: To provide a common entrance slave unit interphone system for collective housings capable of reducing wiring and adjustment work even when collective housing is renewed.SOLUTION: An individually-wired common entrance slave unit 10 includes: a registration operation section 11 that receives a registration operation of a desired dwelling unit number with respect to each of connection terminals T, ... T; a dwelling unit number storage 18 that stores the dwelling unit number registered by the registration operation section 11; a call operation section 11 that receives a call operation specifying a dwelling unit number; and a channel selection circuit 15 that selects a connection terminal T corresponding to the called dwelling unit number to form a transmission channel with a dwelling master unit 30 connected to the connection terminal T. |
