Electronic Systems Technology, Inc. dba ESTeem Wireless Modems uses its research and development, manufacturing, production, and marketing efforts to produce the ESTeem™ product line of industrial wireless Ethernet and serial radios.  ESTeem Wireless Modems are available in high-speed wireless Ethernet using licensed and unlicensed spread spectrum frequency bands.  ESTeem also produces licensed, narrow band radios in the VHF and UHF communication bands with both Ethernet and serial interfaces. These industrial hardened product lines provide innovative communication solutions for applications not served by conventional communications systems.