Abstract: Apparatus and methods for controlling physical access to a location include an entry system including at least one barrier at the physical location, with the barrier configured to selectively permit access into and/or from and/or within the physical location upon proper credentials and/or authorization. A cellular device is connected to or integrated with the entry system and is configured to transmit and receive voice and/or data information to the entry system that includes the credentials and/or authorization. The cellular device can be a retrofit to prior art/installed systems, can be external to an otherwise operational system, and/or can be integrated natively into the entry system. Methods and apparatus are disclosed to determine the power status and network link state of the cellular device and/or to establish communication through/to same, as well as for the cellular device to be connected to and control a plurality of entry systems and/or barriers.

Abstract: Apparatus and methods for controlling physical access to a location include an entry system including at least one barrier at the physical location, with the barrier configured to selectively permit access into and/or from and/or within the physical location upon proper credentials and/or authorization. A cellular device is connected to or integrated with the entry system and is configured to transmit and receive voice and/or data information to the entry system that includes the credentials and/or authorization. The cellular device can be a retrofit to prior art/installed systems, can be external to an otherwise operational system, and/or can be integrated natively into the entry system. Methods and apparatus are disclosed to determine the power status and network link state of the cellular device and/or to establish communication through/to same, as well as for the cellular device to be connected to and control a plurality of entry systems and/or barriers.