Increase number os rings

Is there a way to add rings, force ring like, Ring(3) something like that ?

I want to add some rings before a announcement starts.

Thanks

exten => 1,1,Playtones(ringing)
exten => 1,n,Ringing()
exten => 1,n,Wait(3)
exten => 1,n,Answer()
exten => 1,n,Playback(tt-monkeys)