(10)VOXVOX is the automatic transmitting function by inputting voice intothe VOX headset mic without pressing the PTT key.1. Press select/ key momentarily twice while instandby mode to enter VOX Sensitivity mode. Thecurrent selected VOX setting will flash on the display.2. Press or key to adjust the VOX sensitivity. 1 isthe highest sensitivity and 4 is the lowest sensitivity.VOX can be turned off by selecting ‘oF’ icon.3. Press select/ key five times to confirm thesetting and exit to standby mode.The ‘VOX’ icon is shown on the display when VOX is selected to on and theVOX Headset is plugged into VOX Headset Jack.The ‘TX’ icon blinks when the voice level is possible to transmit at thecurrent selected VOX sensitivity level.TRANSMITTING A CALL TONEYour uh043sx radio is equipped with 5 selectable call tones that will betransmitted when the /call key is pressed momentarily.To select a call tone:1. Press select/ key momentarily three times whilein standby mode to enter Call Tone mode. Thecurrent call tone number (C1-C5) will be indicated.2. Press the or key to select desired call tone.Each tone will be heard through the speaker.3. Press select/ key four times to confirm and exit to standby mode.To transmit the selected call tone, press the /call key.The selected tone will automatically be transmitted for a fixed lengthof time. Call Tone will be cancelled when the PTT key is pressed.Current regulations require calling tones to be restricted to onetransmission per minute. If a second transmission isattempted within one minute then an error tone will sound.