I have Asterisk 1.4.42 setup with 2 extensions and a DID.
a.) I want to setup VoiceChanger for one extension.
b.) I also want to set Call Screening for the DID (see http://www.tek-tips.com/viewthread.cfm?qid=1375895 ) Basically the call is answered and asked the party to state their name after the tone, after that asterisk tries to contact me and when I pick up I hear "You have a call from XXXX . Press 1 to accept and 2. to Reject" . If I reject then the caller hears some recording and be sent to voicemail.
Please make sure you test your setup.