Regional Settings AC Impedance Resistance 600 ohm GR-57 900R+2.16uF ETSI 270R+750R/150nF DC Current Feed 25mA / 40mA Ring Voltage 60Vrms Sinusoidal 67Vrms Trapezoidal CID Type Support for FSK only Media Port Settings Tone Cadence Settings Ring Cadence Settings <Go back to Telephony>