" I am ahead of my time here " ...yep that's the problem.
" the elevator will fall to the bottom floor " ...i certainly hope not.
If by what you mean is that the elevators have emergency battery lowering units then yes , if properly maintained then In a power outage they should lower ( not fall ..big difference ) to the ground floor and open the doors. Do you have someone checking the operation of the lowering units monthly ? Do you understand that elevators can have faults that will cause passengers to be trapped other than power outage .
The reason people " seemed to get angry at you " was nothing to do with you choosing to work with an alarm company and everything to do with you ignoring the advice of experts. There is a reason the alarm companies don't want to get involved with elevator telephones . Its called liability. I have a feeling you may discover this the hard way .