ringtone

Etymology

From ring + tone.

noun

The sound made by a telephone when ringing.“voltage generator ringtone for installation in terminal stations of telephone communication systems for carrier wave”
A customizable tone used to indicate an incoming call on a telephone, especially a mobile phone.“I set my favorite song as my ringtone.”

verb

Of a telephone: to play a ringtone.“My handheld ringtoned “Happy Days are Here Again.” I withdrew into a quieter corner of Mahogany Bar and stuck a finger in my other ear.”