FARs allow one call, which makes sense. Company may want to tell u flight is delayed, sleep in two more hours, etc.

You are also allowed to unplug/turn off phone and not take calls till rest ends.

I love our airline policy...they call and wake us up when it is time....they miss the call...not your problem. Plane delayed, you keep sleeping. They set up transportation to the aircraft.

But, they don't call you if you are DH as airline passenger...you have to set your own wake up and set up your transportation to airport....they pay for transport.