FIELD: transport.
SUBSTANCE: invention relates to acoustic data I/O device, in particular, passenger railway vehicle. Proposed device comprises data output device 5, data input device 1 and at least one data transfer line 4 connecting device 5 with device 1 for electric data transmission. Said transmission line represents closed loop passing from vehicle front to vehicle rear and, therefrom, to vehicle front. Note here that input device 1 is connected to one point of said loop. Said loop comprises two dividing devices 10 between which section of line 3 is located. In the case of short circuit in said section, it can be withdrawn from said loop, that is, it is detachable from connected input device 1 and output device 5.
EFFECT: possibility to transmit voice calls at short circuit conditions in transmission line and/or in device connected to line or in line breakage.
6 cl, 2 dwg
