I know that Long Call is 13 hour call out to Push Time. I've had Scheduling call me for a trip that was going to push 12:45 from the call. Told them it was illegal to assign me the trip. There only option was to change the trip where the push time was 13 hours from the call. They found someone else.
What happens for a Deadhead flight in which the assignment is less than 13 hours Push time. It's possible they could delay a DH flight to match the 13 hours, if they needed you bad enough, but does the 30 min check-in for a DH flight somewhat override the 13 hour push requirement? Asking in case scheduling says you have to be there for a DH, therefore you should be boarding, and are available for the DH flight out, even though it's less than 13 hours push from the call.
Lastly, If you check your schedule at 1800 coming off a Day off, and you snapshot the page at 18:00 showing no trips assigned, are you cleared until 2400, isn't that correct? So now scheduling could call at 12:01 AM but only for a long call assignment.