What's the difference between radiophone and radiotelephone?

Radiophone

Definition:

(n.) An apparatus for the production of sound by the action of luminous or thermal rays. It is essentially the same as the photophone.

Example Sentences:

(1) But Doctor Who overshadows them all – not just because of its fame, but because it was mixed by the BBC Radiophonic Workshop’s Delia Derbyshire, who transformed it into an early masterpiece of electronic music.
(2) A study comprising in-depth interviews of sisters in all 15 rural clinics in the Mhala district of Gazankulu showed them to experience major problems with support systems: radiophone communication was unreliable (and even absent in 3 clinics); transport was inadequate; the cold chain was not well maintained and essential drugs and equipment were absent (only 1 clinic had all the equipment to manage a neonatal resuscitation adequately).