Skype In with call forwarding.
Remove your home number from crew control list. (If they ever call it complain - they are not meant to.) Replace it with your new Skype In number.
Forward your Skype number to your home number when you are on reserve or available, other times it will just ring out.
Can also use voicemail if you want them to leave a message.
Costs a couple of euro a month. Small price to pay!
CX SS