E. F. Johnson Company
EFJohnson Technologies offers a wide range of equipment for law enforcement, fire fighters, EMS, and military. Products include Project 25 systems, portable/mobile two-way radios and radio encryption products.
(Recent) Product introductions 
- 2010: Introduced the 51FIRE ES, the first portable radio engineered specifically for firefighters.
- 2009: Introduced Hybrid IP25, a Project 25 compliant wide area conventional system and a hybrid network intended to allow first responders to operate and interoperate between the conventional and trunked systems and eliminate the need for dispatchers to manually patch calls between the two systems.
- 2009: Introduced StarGate Dispatch Console, an IP-based dispatch console for first responders. StarGate was named the Hot Product by Public Safety Communications, the official magazine of the Association of Public-Safety Communications Officials (APCO).
- 2008: Introduced the Lightning Control Head, a mobile radio control head that incorporates electroluminescent technology.
- 2007: Introduced IP25 MultiSite, a switchless Project 25 trunked infrastructure system that is specifically designed for first responders. This Voice over Internet Protocol (VoIP) based system meets the NTIA mandates for narrowband operation in VHF and UHF frequencies as well as DOD mandates for Project 25 compliance.
- 2006: EFJohnson introduces the Enhanced (AMBE+2) Project 25 Vocoder in its entire radio product line.
The company began as a mail order business, selling radio transmitting parts to amateurs and early radio broadcasters and was active in World War II defense production. After the war, the company introduced its Viking line of amateur transmitters, among them, the Viking, Valiant, Ranger and Pacemaker. The company transitioned to development and manufacturing of land-mobile radio products such as CB, business radio and associated technology such as the Logic Trunked Radio trunking format. EFJohnson's discontinued Viking line of amateur radio transmitter products are collected, restored, and operated by a number of vintage amateur radio enthusiasts.
In 1995, the Project 25 standard for interoperability was endorsed by APCO, American Association of Railroads, the National Association of State Telecom Directors, the Department of Defense, National Security Agency, National Telecommunications & Information Administration, and Department of Justice. EF Johnson signed a Memorandum of Understanding to develop products that comply with the agreement. The company was purchased in 1997 by software manufacturer Transcrypt International. Headquarters relocated to Irving, Texas in 2005 and the company became EFJohnson Technologies in 2008. In 2010, EF Johnson Technologies, Inc. was acquired by Francisco Partners.