Busy Channel Lockout; Time-Out Timer (Tot) - Hytera DMR Installation Manual

Functions and Operations
Operation: To power on the mobile radio, start the
engine or hold down the Power On/Off key; to power
it off, stop the engine or long press the Power On/Off
key.
 Ignition Only: The mobile radio powers on or off by
following the ignition sense only. The Power On/Off
key does not work.
Operation: To turn on the mobile radio, start the
engine; to turn it off, stop the engine (The Power On/
Off key does not work).

Busy Channel Lockout

If enabled via the programming software, this feature can
prevent your mobile radio interfering with other transmitting
terminals on the same channel. If you hold down the PTT
key while the channel is in use, your mobile radio will keep
beeping and display text information "Channel Busy",
alerting you to transmission prohibition. To stop beeping,
please release the PTT key. When the channel is free, you
can press and hold down the PTT key to transmit.

Time-out Timer (TOT)

The purpose of TOT is to prevent any user from occupying
a channel for an extended period. If the preset time
expires, the mobile radio will automatically terminate

transmission and keep beeping. To stop beeping, please
release the PTT key. You must wait for a certain time
period (preset by your dealer) before you can press and
hold down the PTT key to transmit again.
If the pre-alert function is set by your dealer, your mobile
radio will alert you to the TOT expiration in advance.
Note: This feature is null in Emergency mode.