I have a Norstar Voice Mail 4.0 on a MICS 4.1. It shows channels 5-8 availible but changing min and max for voice and fax do nothing. We believe it has been key coded for only 4 channels. We have the key code to make it 8. Where excactly do we insert the key code.

tossed you a manual via email. hope it helps.
email me if you still have any issues.

backup your nam before you upgrade!!