We use group_confirm_file with group_confirm_key=exec to require that users "Press ANY key to accept the call" when answering. The problem is, that we only want to do this for calls to external devices. For internal (registered SIP) devices, we do not want to require a keypress to connect. 

How can we selectively use group_confirm_file on specific bridged legs, while still simultaneously dialing out to all legs?

Thanks,

Lyle