TC-518 Owner’s Manual
24
Busy Channel Lockout (BCL)
Avoid interference with the users using the same channel by preventing transmission if another
talk group is already on the air. The radio will generate a continuous tone upon [PTT] press if a
transmission is not allowed. Release the [PTT] to cancel the tone.
See Glossary for definition of BCL.
Low Battery Alert
For extra convenience, LED flashes red and a low-pitched tone sounds at every ten seconds to
alert users to recharge the battery should the battery level run low.
Voice Operated Transmit (VOX)
You can transmit hands free with the use of optional accessories. The radio will automatically
begin transmitting when you speak, and terminate transmitting when you stop talking. See
Glossary for definition of [VOX].
Press the programmed [VOX] key to activate or exit the [VOX] feature, with alert tone sounds
accordingly.
Your dealer can enable/disable the [VOX] feature, and set the [VOX] sensitivity. When [VOX]
feature is enabled, the user can transmit hands free with [VOX] accessories:
1. Press the programmed [VOX] key to activate the [VOX] feature.
2. Select the [PTT]/[VOX] switch on the earpiece to [VOX].
3. Plug the earpiece into the accessory jack.
4. Speaker into the earpiece microphone and your voice will be transmitted.
When transmitting with [VOX] accessories, you may here your own voice from the [VOX]
earpiece slightly. Press the [PTT] of your radio to disable the [VOX] feature. Turn the radio off on
again, or plug the earpiece into the accessory jack again to restore the [VOX] feature.
Note: No matter whether the [VOX] feature is enabled, if you select the [PTT]/[VOX] switch on
the earpiece to [PTT], you are able to transmit by press of the external [PTT], and you are not
allowed to push the switch from [PTT] to [VOX], this action shall cause the radio to continuously
