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Several hand-held Project 25 radios used around the world.
Project 25 (P25 or APCO-25) is a suite of standards for interoperable digital two-way radio products. P25 was developed by public safety professionals in North America and has gained acceptance for public safety, security, public service, and commercial applications worldwide.[1] P25 radios are a direct replacement for analog UHF (typically FM) radios, adding the ability to transfer data as well as voice for more natural implementations of encryption and text messaging. P25 radios are commonly implemented by dispatch organizations, such as police, fire, ambulance and emergency rescue service, using vehicle-mounted radios combined with repeaters and handheld walkie-talkie use.
Starting around 2012, products became available with the newer phase 2 modulation protocol, the older protocol known as P25 became P25 phase 1. P25 phase 2 products use the more advanced AMBE2+ vocoder, which allows audio to pass through a more compressed bitstream and provides two TDMA voice channels in the same RF bandwidth (12.5 kHz), while phase 1 can provide only one voice channel. The two protocols are not compatible. However, P25 Phase 2 infrastructure can provide a "dynamic transcoder" feature that translates between Phase 1 and Phase 2 as needed. In addition to this, phase 2 radios are backwards compatible with phase 1 modulation and analog FM modulation, per the standard. The European Union has created the Terrestrial Trunked Radio (TETRA) and Digital mobile radio (DMR) protocol standards, which fill a similar role to Project 25.
^"What is P25 Technology?". Project 25 Technology Interest Group. Archived from the original on 29 April 2020. Retrieved 17 November 2020. Project 25 (P25) is the standard for the design and manufacture of interoperable digital two-way wireless communications products. Developed in North America with state, local and federal representatives and Telecommunications Industry Association (TIA) governance, P25 has gained worldwide acceptance for public safety, security, public service, and commercial applications...The P25 standard was created by, and is intended for, public safety professionals.
Project25 (P25 or APCO-25) is a suite of standards for interoperable digital two-way radio products. P25 was developed by public safety professionals...
Initiating the project (13%) Planning the project (24%) Executing the project (31%) Monitoring and controlling the project (25%) Closing the project (7%) The...
Project 2025, also known as the Presidential Transition Project, is a collection of policy proposals to thoroughly reshape the U.S. federal government...
The Sharp Project. 25 February 2011. "Lime Pictures to shoot new comedy at Sharp Project, series 2 and 3 were also filmed at The Sharp Project". Manchester...
military. TETRA is the European version of trunked radio, similar to Project25. TETRA is a European Telecommunications Standards Institute (ETSI) standard...
two songs every month of the year for their Every Day6 project. By the end of the project, 25 songs were added to their discography. With genres ranging...
Project. 19 December 1981. Retrieved 7 November 2015. "Larry Grayson's Generation Game - BBC One London - 25 December 1978". BBC Genome Project. 25 December...
BBC Genome Project. 18 September 1982. Retrieved 22 April 2020. "Blankety Blank - BBC One London - 25 September 1982". BBC Genome Project. 25 September...
T-REX project ended on August 22, 2006. The COSMIX project was completed in December 2007. Several other smaller improvement projects for I-25 are still...
up project management in Wiktionary, the free dictionary. Project management is the process of leading the work of a team to achieve all project goals...
The Manhattan Project was a program of research and development undertaken during World War II to produce the first nuclear weapons. It was led by the...
Project Gutenberg (PG) is a volunteer effort to digitize and archive cultural works, as well as to "encourage the creation and distribution of eBooks...
Project Nimbus (Hebrew: פרויקט נימבוס) is a cloud computing project of the Israeli government and its military. The Israeli Finance Ministry announced...
November 25, 2017 "The Montauk Conspiracy". "The Montauk Project: Stranger Times". The Philadelphia Experiment from A–Z. "The Montauk Project: Questioning...
(25 June 2023). "Kamal Haasan Joins Prabhas, Deepika Padukone and Amitabh Bachchan on Cast of 'Project K'". Variety. Archived from the original on 25 June...
first U.S. government project in which lysergic acid diethylamide (LSD-25) was used on human subjects. The Navy ended the project in 1953 when its experiments...
States Navy initiated Project CHATTER, an interrogation program which saw the first testing of lysergic acid diethylamide (LSD-25) on human subjects. In...
goals of the project are to provide crisis intervention and suicide prevention services for youth (defined by the organization as people under 25), as well...
in Rajamahendravaram City and 25 km from Rajahmundry Airport. In July 1941, the first conceptual proposal for the project was mooted by the erstwhile Madras...
founded by Kim Hyung-tae, first teased the game under the working title Project Eve in 2019. By 2021, it was revealed as a PlayStation 5 exclusive to be...
Project Zomboid is an open-world, isometric video game developed by British and Canadian independent developer The Indie Stone. The game is set in the...
Connecting Every Village Project to promote universal access to telecommunication and internet services in rural China.: 24–25 The MIIT required that...
Project Nike (Greek: Νίκη, "Victory") was a U.S. Army project, proposed in May 1945 by Bell Laboratories, to develop a line-of-sight anti-aircraft missile...
25 April 1994". BBC Genome Project. 25 April 1994. Retrieved 22 May 2016. "Going for Gold – BBC One London – 25 August 1994". BBC Genome Project. 25 August...
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