Unlike many folks, my workphone is sitting on a table some distance away from my personal computer. It sits there quietly, and I ignore any of the bloops that come from it when mail arrives. The only times I pay attention to it is either if there's a EAM (Emergency Action Message) or if it's a phone call from one of my three executives I support 24/7. But since they're engineering-type folks, I rarely get bothered by them on the weekends or holidays, so the phone sits there. As for my work-issued laptop, it sits at work, the only times I'll bring it home is if there is an absolute need for me to support folks (usually over an extended holiday, and even then it may be just one call at most.)
The same is true for my personal cellphone. Yes, if it's from one of the two people who have my number (good friends) then I'll reply, otherwise I ignore the phone. When I'm at home, I don't care to deal with work issues, this is the time where I relax from work and enjoy some quiet time. As for vacation, *nothing* from work is brought with me, and the rule of thumb is that the building had better be burning down and I don't smell smoke, so it has to be that level of importance before I'll answer the phone.
I work for a very large company, so when it comes to vacation time, the management wants you to use it. They at least recognize the value of an employee who is rested and relaxed, although I often see management taking their work equipment with them on vacations. If that's what they want to do, that's fine... just understand that when I have my time off, it's *MY* time off, and I am going to savor it.