Motorola MOTOTRBO SL300 Portable 2-Channel Analog/Digital 2-Way Radio (UHF Band, No Display) - Manuel (Page 32)

4 Release the PTT button to listen.
The green LED lights up when the target radio
responds.
5 If the Channel Free Indication feature is enabled,
you hear a short alert tone the moment the
transmitting radio releases the
PTT button, indicating
the channel is free for you to respond. Press the PTT
button to respond to the call.
The call ends when there is no voice activity for a
predetermined period.
English
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