Retevis RT23 Manual page 30

Remote Stun/Remote Stun wakeup
Transmit remote stun code (such as 1212), transmit 1212 code then that transceiver can be only receiving
To wakeup that transceiver , only need to transmit remote stun code 1212+# code
Remote Kill/Remote Kill wakeup
Transmit remote kill code (such as 1234), transmit 1234 code then that transceiver can not
transmitting and receiving.
To wakeup that transceiver , only need to transmit remote kill code 1212+# code.
Transmit DTMF Code Manually
This transceiver can transmit DTMF code manually, when this transceiver is transmitting,
input 0-9ABCD*# on the keypad, then the corresponding codes will be transmitted. PF1
corresponds A code,【
and 【 】 key corresponds D code
M R
VF O
Call
Transmit stored DTMF code
Press 【 】 key 2s or short press programmed PF1/PF2, enter DTMF code groups, rotate
M R
VF O
Call
channel knob to select DTMF code groups, press PTT to transmit.
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】key corresponds B code, 【 】 key corresponds C code,