Just so I understand..

Say you are sitting long call. 24 hour phone availability. The crew scheduling calls you to inform of a short call assignment starting in min. 10 hours from now:

1. Do they ever give you more time (more than 10 hours)? Do you even know your short call days in advance?
2. How is the notification done - phone call?


Basically in order to sit long call at home you have to be able to arrive to your base within 10 hours, it that correct?