A system has a plurality of communications devices within a geographic area. Each device is capable of communicating from within the geographic area with any other device proximate the device, and is also capable of communicating from within the geographic area with a communications service having access to an area external to the geographic area if such communications service is operational and available to the device. At least one of the devices is a gateway device that communicates from within the geographic area with the communications service, and at least some of the devices are non-gateway devices that communicate from within the geographic area with the gateway device. Each non-gateway device communicates from within the geographic area with the area external thereto by way of the gateway device and the communications service communicated with by the gateway device.