2N EasyGate IP User Manual page 63

5.6.6 Ring
The Ring folder helps you set the ringtone parameters.
Frequency – set the ringing tone frequency. The default value is 50 Hz.
Modulation – set the ringing tone modulation in ms:
2000/4000
1000/4000
400/200/400/2000
1500/3500
2000/4000
Voltage – set the ringing tone voltage. The default value is 42 Vrms.
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