How is over the air access to Internet Radio Linking Project (IRLP) nodes accomplished?
AnswerBy using Dual-Tone Multi-Frequency (DTMF) signals
IRLP nodes are commonly controlled over the air with DTMF commands sent from the user's radio.
Technician · FCC ELEMENT 2
T8C06
Technician · FCC Element 2 · answer reveals automatically