Asterisk: Outbound and Inbound call at the same time

Asterisk: Outbound and Inbound call at the same time

I am looking this use case scenario for Asterisk. I am using v 1.8 running
a Cetnos 6.4 Linux distribution.
1.An outbound call is initiated via Asterisk
2.Both the internal extension as well as the outbound call-phone starts to
ring.
The first person to pick up (either the internal extension or outbound
call-phone) will
hear the a pre recorded message to hold as the call is being connected to
the other user
i.e: If outbound call-phone picks up first then he will be asked to hold
the line while the call is being connected to internal-phone user.
Any inputs?