Ok clever people here is a puzzle?
At work we have electronic gates that automatically call my phone for entry when we have a delivery etc, if I don't answer within a certain number of rings the gate system then calls the next member of staff, and if they don't answer it rings a third person, we speak to the delivery driver and let them in by pressing #. The issue I have is that I work on a big country estate and often don't have signal so its important that my voicemail works, it is set to answer after a longer duration then the gate system so when i have signal everything works fine, but when I'm somewhere i don't have signal or if my battery dies, this leaves the person at the gate talking to a voicemail and not being let into the property, because the machine doesn't know its a machine that answers not me? So
Question 1: Can I turn my voicemail off only when I don't have signal or my phone is off ?
Question 2: If there is no way to turn off voicemail just when my phone is unavailable, is there a way to exclude a specific number from voicemail ie. if I get a call from the gate it never gets forwarded to voicemail.
Question 3: If neither 1 or 2 are an option would it be possible to have a clever call forwarding solution to another phone that is permanently plugged in somewhere.
Please help as I can't find anything online that will be a simple fix TIA
