Integrate jablotron oasis sensors

Hi guys,
i have an old jablotron oasis 80 alarm system with 866mhz wireless sensors. Since this old alarm system don't have a network lan access, I'm searching a way to get the status of each wireless sensors.
googling dont get much result, i can only get if the alarm is armed or not.

Anybody have some solution to achive this goal?
Yuri

Does the control panel have a status LED for each sensor?
If so just monitor the voltage across each one.

Quick googling indicates this uses encrypted wireless links, but seem to be full manuals available online, worth
checking out in case there some form of external monitoring supported?