Patent ID: 9691200
Date: 2017-06-27
CPC Classifications: G07C

Claim:
1. A method comprising: providing a secured space including a first secured area and a second secured area, wherein the second secured area is accessed through the first secured area, and wherein the second secured area has a higher security level than the first secured area; controlling access into the first secured area via a first access controller; controlling access into the second secured area via a second access controller; an occupancy processor monitoring the first and second secured areas for a presence of persons based upon access grants from the first and second access controllers; deactivating power to the second access controller associated with the second secured area when there are no occupants within the first secured area, wherein the deactivating includes deactivating the power to the second access controller in accordance with a predetermined event and a security level, and wherein the predetermined event is a power failure; measuring a reserve battery backup power level following the power failure; deactivating the first access controller associated with the first secured area upon detecting that the reserve battery backup power level is lower than a threshold; and continuing to supply the power to the second access controller upon detecting that the reserve battery backup power level is lower than the threshold.