How do you play the radio through the NEC Dterm80 Phone System

The NEC phone system needs to have a radio attached to distribute the music to the phone sets.
It is not illegal to play the radio through a phone system (radio advertizements pay for it)


This is a Dterm 80 phone set

BACKGROUND MUSIC
To turn Background Music on or off:
1. Press the Speaker key.
2. Dial 725.
3. Press Speaker to hang up.

It is illegal in the USA to play radio broadcasts through a phone system. You would need to subscribe to something like muzak to do thise

Stick your ***** in it.