They enable cost-effective and highly secure IP communications for field automation endpoints such as PLCs and RTUs. v t e Telecommunications History Beacon Broadcasting Communications satellite Computer network Drums Electrical telegraph Fax Heliographs Hydraulic telegraph Internet Mass media Mobile phone Optical telecommunication Optical telegraphy Photophone Prepaid mobile phone Radio Radiotelephone Satellite communications Semaphore Smartphone Smoke signals Telecommunications history Telegraphy Telephone The Telephone Cases Television Timeline of communication technology Undersea telegraph line Videoconferencing Videophone Videotelephony Pioneers Edwin Howard Armstrong John Logie Baird Paul Baran Alexander Graham Bell Tim Berners-Lee Jagadish Chandra Bose Vint Cerf Claude Chappe Donald Davies Lee de Forest Philo Farnsworth Reginald Fessenden Elisha Gray Innocenzo Manzetti Guglielmo Marconi Antonio Meucci Alexander Stepanovich Popov Johann Philipp Reis Nikola Tesla Camille Tissot Alfred Vail Charles Wheatstone Vladimir K. These building blocks, along with services from ABB Wireless, are used to construct modern wireless IP field area communication networks for utility smart grids, oil and gas fields, mines, and industrial facilities. TeleOS unlicensed sub-1 GHz point-to-multipoint (PTMP)/point-to-point (PTP) radios provide a power efficient SCADA communications solution as well as connectivity to remote endpoints at low to medium speeds. ISBN0-471-06259-6. It has been suggested that this article be merged into Star network. Back An error occurred and your inquiry could not be sent.Please try again later. Fixed Broadband Wireless System Design.