Fermax DUOX - Reset Settings; Reset Mapping (Call Button); Factory Default Values Reset

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TECHNICAL FEATURES
Dynamic resist. 50 
Call Ring tone Selection
Microphone: Electret
Operating Temperature
Power supply (non-polarised)
Consumption (±5%)
in standby + led
maximum
Loudspeaker
Maximum number of terminals per residence
Telephone address: 6 decimal digits
Number of conversation channels: 2 per BUS. (Only audio installations)
-5º, +40ºC
1.75“ 16 
3
000001...999999
18 Vdc
< 15 mA
190 mA.