5.8.4 Busy Tone

The Busy Tone folder helps you set the dial tone parameters.


  • Frequency 1 – set the busy tone frequency. The default value is 452 kHz.
  • Frequency 2 – set the busy tone frequency. 
  • Modulation – set the busy tone modulation:
    • 330/330
    • 200/200
    • 250/250
    • 375/375
    • 500/500

The factory default values are listed in Chapter 3. Tóny na telefonní lince – provozní tóny.