Dial Commands "D" Option

When using the dial command and the D option to send DTMF digits when the channel is answered, is there a way to allow for some dead air, and then send more DTMF digits? I would like to automate a call, and it requires entry of a few short dtmf digits all a couple seconds apart from each other.

not too sure if mean in extensions.conf

if you do WAIT works.