According to https://www.ghielectronics.com/docs/39/fez-hydra-developers-guide
PPP and RTC Alarm is not working on Hydra.
How is it possible to get these features onto the Hydra?
@ njbuch - It is more that they are not supported on the Hydra, not that they are not working. Your best bet is to implement them yourself either in C# or through compiling your own firmware.