I have just installed a StarTalk Flash 2.0 in a 824 DR5. Done a few of these. It is set to answer calls on lines 1-5. The AA picks up on lines 2-4 just fine. On line 1 when you call in you hear "This mailbox has not been initialized ..." But only line 1. I know some of the users have not yet initialized their mailboxes. I checked and only extension 221 is set to ring on the lines. I do know that 221 was set to CFNA to 222 before I installed the STF.