I'm not claiming I know much about 117, but I just read 117.25 (e) and (f), which seems to be the pertinent text, and I'm just saying that we have a duty to not to fly if we (the pilot) determine that the 8-hour sleep opportunity was interrupted. We also have the right to 10 hours free of duty. If you determine that your sleep was interrupted, then I think you should call and get an additional 8 hours sleep opportunity.

No one but you knows whether your opportunity was interrupted, and it's no based on the number of calls. Construction at the hotel might interrupt it, and you might sleep through a phone call, or turn it off and miss the subsequent interruptions. The reason I'm pointing this out, is that you shouldn't link the number of calls with an automatic interruption. In some cases, one is too many. I don't want people to think that the company is allowed to wake them up just once, but two calls is illegal. The regulations don't state that.

I don't know where the one-call "rule" comes from. It's on the 117 FAQ's on deltanet, but so is the nonsense about reserves having to acknowledge earlier than the contract.