Two licensed frequency data modems offer long-range communications (up to 40 miles) to extend Ethernet networks into difficult-to-access locations. They support 360- to 512-MHz and 928- to 960-MHz configurations, can operate in access point/client configuration, function as a network bridge or route or serve as a serial server (RS-232/RS-485). The wireless modems feature node-to-node deterministic mesh network repeatability for extended range and multiple channel spacing options to increase network scalability. They are optimized for throughputs of up to 25.2 kbps, providing secure wireless communications in challenging outdoor environments and over obstructed paths typical of remote monitoring and control applications.