Ringing (signal) definition

(1) Having a tendency to reverberate or be repeatedly reflected

"A reverberant room"

"The reverberant booms of cannon"

(2) Having the character of a loud deep sound; the quality of being resonant

(3) The giving of a ring as a token of engagement

(4) The sound of a bell ringing

"The distinctive ring of the church bell"

"The ringing of the telephone"

"The tintinnabulation that so voluminously swells from the ringing and the dinging of the bells"--E. A. Poe