Paradyne, also referred to as AT&T Paradyne, was a maker of computer networking and telecommunications hardware, based in Largo, Florida. The company formed in 1969 to supply computer communications systems and expanded steadily through the 1970s and 80s. During these period they operated in the high-end modem market and competed with Motorola Codex, Racal-Milgo, and divisions of AT&T and IBM.
As one of its first major purchases after the 1982 Breakup of the Bell System, AT&T purchased the company for $250 million in 1989. The company grew to become a major supplier in the digital subscriber line (DSL) industry as that expanded. When AT&T spun off Lucent in 1996, Paradyne moved to the new company. Lucent quickly sold Paradyne to Texas Pacific Group (TPG Capital) for $175 million where it became Paradyne Networks. The company changed hands several times since then and has been owned by DZS since 2005.
- "Lucent Technologies agrees to sell AT&T Paradyne unit"; The New York Times, June 20, 1996.
- "Paradyne At A Glance". Archived from the original on 17 June 1997.
- "Lucent Technologies Agrees To Sell AT&T Paradyne Unit". The New York Times. 20 June 1996.
- Bonner Jr., George (23 March 1983). "Paradyne Corporation, a maker of 'modems,' rebounds and astounds". The Christian Science Monitor.
- Trigaux, Robert (4 October 2005). ""For sale' sign out at AT&T Paradyne". Tampa Bay Times.