An entity of a private communications network, such as a controller of an ACD system, controls the operation of a network router of a public communications network, thereby eliminating the need in a network-routing system to send sensitive event or status information of the private network to the network router. Each of the plurality of pixels includes a transmissive display area and a reflective display area. In addition, the method includes storing the modified at least one role. Within the network resides a presence state machine, which determines if a PTT conversation may be initiated.