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3-9. DC characteristic: Settings for DC characteristics
3-10. Impedance: Settings for impedance
3-11. Busy tone cycles: Settings for Busy tone cycle
3-12. BusyToneMinOn: Settings for Busy Tone Min. On time
3-13. BusyToneMaxOn: Settings for Busy Tone Max. On time
3-14. BusyToneMinOff: Settings for Busy Tone Min. Off time
3-15. BusyToneMaxOff: Busy Tone Max. Off 시간 설정