Innovage 1604007 Corded Phone "telephone models music hold" Questions

...music-on-hold for your telephone line(s). 1st you need to have a source of music such as a radio that has an output connection to feed the radio signal to the tele system, or a recorded music player ...

...music for my Panasonc KX-T7731. We've set up the radio to the telephone system in the back, but when I press 1 on my dial pad nothing happens. How do I set up the on-hold music? There could be a ...

...music. Additionally,the volume is not very loud(even w/ the high switch). My phone model number 18924 gives me a four beats of sound when I use my cordless phone connected to the same telephone line. ...