[Asterisk-Users] Extensions busy queue

[Gregory Wiktor - ADCom Corp.]

Hello All,
I was wondering if anyone has a solution to the following:

I have a dialplan to route to an extension, but if the extension is busy
I want the user to get a message, and hold.  I want them to be able to
press 1 to leave a message if they do not wish to hold.

If the extension rings but no answer, I will execute a different
sequence.

This is a single extension setup

Any help would be appreciated.  

Thanks,
Greg