A system for monitoring at least one person passing through an area includes a first monitor (104), a second monitor (106), and a receiver (108). The first monitor is configured to detect activity in a first zone (110) and to obtain first data relating to detected activity in the first zone. The second monitor is configured to detect activity in a second zone (111) and to obtain second data relating to detected activity in the second zone. In addition, the first monitor is in circuit communication with the second monitor and in wireless communication with the receiver. After obtaining the second data, the second monitor generates a second monitor signal (112) that comprises the second data and sends the second monitor signal to the first monitor. The first monitor is configured to receive the second monitor signal and generate a combined data packet that comprises the first data and the second data. After the first monitor generates the combined data packet, the first monitor sends a combined signal (114) to the receiver, in which the combined signal includes the combined data packet.