On which of the following bands is phone operation prohibited?
160 meters
30 meters✓Bonne réponse
17 meters
12 meters
Explication
Section 97.305 lists emissions band by band, and for 30 meters it authorizes only RTTY and data across the whole band. Phone is available somewhere on 160, 17 and 12 meters, so 30 meters is the only band here with no voice segment at all.