IFR COM-120B Evaluation Manual page 24

3. The supplied transmitter does not have a DTMF keypad so the COM-
120B's internal DTMF generator will be used to simulate pressing
keys on a radio's DTMF keypad. The COM-120B's DTMF generator
will externally modulate the transmitter and the COM-120B's receiver
and DTMF decoder will decode the transmitted DTMF tone codes.
4. Set the radio channel to 2 and Key the radio.
Rev. 1.0
DTMF codes are decoded
and displayed here.
Page 24