I am coming up on this same situation and have been trying to find the answer in writing. I have been looking at "When Scheduling Calls" and the contract and haven't found anything yet. The only thing that I have found referencing it so far is on the Crew Resources and Scheduling page. "As a result, it is possible for PBS to award RES days on Sept 1-2 which would give the pilot 11 consecutive RES days. This is both FAR and Contractually compliant and only requires a 24 hour break in duty in any 7 day period" Nothing about a phone call though, seems to me that they would have to put rest on your schedule somewhere to make you legal. Hopefully someone will be able to come up with a better answer.