When I am in crunch I always enable my OoO with a polite message explaining I am in crunch and that I cannot respond to them immediately but will do within the

When I am in crunch I always enable my OoO with a polite message explaining I am in crunch and that I cannot respond to them immediately but will do within the next few days. I also have a dedicated mobile number which I include (which is different to my regular mobile) when I have for people to contact me in there is a real emergency that only I can resolve. Nobody has ever called it :)