The phone signal Ex-Duo signalizes incoming calls from stationary telephones as a secondary ringing device. The signaling is ensued by a 5 joules flash and by a 110 dB(A) sounder. Once an incoming call is signalized, the flash and the sounder will be activated. Between the ringing signals the flash is bridged for continuous flashing. Different sounds can be set individually.
The phone signal Ex-Duo signalizes incoming calls from stationary telephones as a secondary ringing device. The signaling is ensued by a 5 joules flash and by a 110 dB(A) sounder. Once an incoming call is signalized, the flash and the sounder will be activated. Between the ringing signals the flash is bridged for continuous flashing. Different sounds can be set individually.