Play ring sound of Asterisk for 20 seconds

Is it possible to play the ring sound of Asterisk for 20 seconds? I am now using just a sound file:
exten => s,18,Playback(ring_out)

But I would like to play the Asterisk ring sound.

at an asterisk CLI prompt :


Thanks. But this wouldn’t wait 20 seconds:

“PlayTones(arg): Plays a tone list. Execution will continue with the next step immediately,
while the tones continue to play.”

Anyway to wait 20 seconds?

really ?? so

[demo-playtones] exten => s,1,PlayTones(ring) exten => s,2,Wait(20) exten => s,3,StopPlayTones
was too hard to imagine ??