Cheers for that Mitelpassion, auto camp on timer has already been blanked in the COS for the phones though.
I notice that you mention a design issue that the handset doesn't suppress the hook switch enough so the phone appears busy, this is what I'm trying to acheive in a way(the busy tone part), even if you take the handset off hook & ring the phone from another extn, you will hear ringing in your ear on the calling extn & the 5302 handset's 2nd line key will flash, the customer wants busy tone though, (no 2nd line key flashing). Although if you were to call the off hook extn from an external device you would get busy tone straight away, the 2nd line key wouldn't flash! All 5302's on this site have the same issue & all the handsets key 2 status on the system in the multiline set key assigment field is 'not assigned'. Is there something I'm missing or is this just the way these handsets are meant to work?