I have a client who has 4 copper lines that ring on about 8 handsets. They NEVER want it to go to voice mail. Four of the handsets have personal mailboxes, but there is no system greeting or auto attendant. I have the cover delay set to 9 rings, but it is still covering to one of the personal mailboxes at 4-5 rings. I would like to make it never cover to vm but not sure if that is possible. The four lines are line appearances on all phones. Its a big warehouse where clients (mostly elderly) come to pick up durable medical supplies and get oxygen tanks refilled. Since there is no receptionist, everyone ignores the phone thinking someone else will answer it and once it covers to vm they forget about it. So I want it to never cover if that is possible.