{{Short description|Push to talk over cellular radio}} {{Infobox | title = PoC radio | label1 = Other name | data1 = PTToC radio | label2 = Type | data2 = PoC device | label3 = Core function | data3 = Push-to-talk<ref>Longxin Lin, Baorong Du, Shan Zhou. {{cite book | chapter=The network model and routing algorithm for scalable PoC system | publisher=Institute of Electrical and Electronics Engineers | date=4 November 2010 | doi=10.1109/ICCASM.2010.5620513 | s2cid=16470544 | title=2010 International Conference on Computer Application and System Modeling (ICCASM 2010) | last1=Longxin Lin | last2=Baorong Du | last3=Shan Zhou | isbn=978-1-4244-7235-2 }}</ref> | label4 = Introduced by | data4 = TYT | label5 = Communication mode | data5 = half-duplex }} A '''PoC radio''' (short for push to talk over cellular radio<ref name="9 Benefits of the PoC Radio You Need to Know">Lakisha Davis. {{cite web | title=9 Benefits of the PoC Radio You Need to Know | website=Metapress | date=November 13, 2020 | url=https://metapress.com/9-benefits-of-the-poc-radio-you-need-to-know/ | archive-url=https://web.archive.org/web/20220825144411/https://metapress.com/9-benefits-of-the-poc-radio-you-need-to-know/ | archive-date=2022-08-25 | url-status=live}}</ref>), also known as '''PTToC radio''',<ref name="Cooley 2019">{{cite web | last=Cooley | first=Brian | title=With a black SIM, first responders' calls go ahead of yours | website=CNET | date=May 23, 2019 | url=https://www.cnet.com/tech/mobile/firstnet-black-sim-puts-first-responders-calls-ahead-of-yours/ | archive-url=https://web.archive.org/web/20210725002317/https://www.cnet.com/tech/mobile/firstnet-black-sim-puts-first-responders-calls-ahead-of-yours/ | archive-date=July 25, 2021 | url-status=live }}</ref> is an instant communication device that is based on the cellular network.<ref>Li Hongliang, Li Lifu, Wang Yu. {{cite web | title=An End-to-End Encrypted Scheme for PoC Based on Cellular Network | website=ProQuest | date=17 December 2014 | url=https://www.proquest.com/openview/19634e9b0e84acc0b338ffb09d215c9f/1.pdf?pq-origsite=gscholar&cbl=2029177 | archive-url=https://web.archive.org/web/20220829051919/https://www.proquest.com/openview/19634e9b0e84acc0b338ffb09d215c9f/1.pdf?pq-origsite=gscholar&cbl=2029177 | archive-date=August 29, 2022 | url-status=live }}</ref> It is a radio device that incorporates push-to-talk technology into a cellular radio handset.<ref>Ray Horak. {{cite book | title=Webster's New World Telecom Dictionary | publisher=John Wiley & Sons | year=2008 | isbn=978-0-471-77457-0 | url=https://books.google.com/books?id=EXHVTLms96oC&pg=PA380 | pages=380–}}</ref> It allows users to communicate with one or more receivers instantly,<ref>Mooi Choo Chuah, Qinqing Zhang. {{cite book | title=Design and Performance of 3G Wireless Networks and Wireless LANs | publisher=Springer | year=2005 | isbn=978-0-387-24152-4 | url=https://books.google.com/books?id=ymyCktAEiUMC&pg=PA321 | pages=321–}}</ref> in a half-duplex mode.<ref>Pierre Lescuyer, Thierry Lucidarme. {{cite book | title=Evolved Packet System (EPS): The LTE and SAE Evolution of 3G UMTS | publisher=John Wiley & Sons | year=2008 | isbn=978-0-470-72366-1 | url=https://books.google.com/books?id=gXAuo6c72nkC&pg=PA282 | pages=282–}}</ref>
Although a PoC radio is a walkie-talkie-like device,<ref>Gerardo Gomez, Rafael Sanchez. {{cite book | title=End-to-End Quality of Service over Cellular Networks: Data Services Performance Optimization in 2G/3G | publisher=John Wiley & Sons | year=2005 | isbn=978-0-470-01586-5 | url=https://books.google.com/books?id=B6A-REWhvqYC&pg=PA88 | pages=88–}}</ref> there are substantial differences between them.<ref name="Portable Two-Way Radio: PoC Radios vs. Walkie Talkies">{{cite web | title=Portable Two-Way Radio: PoC Radios vs. Walkie Talkies | website=Express Digest | date=October 15, 2020 | url=https://expressdigest.com/portable-two-way-radio-poc-radios-vs-walkie-talkies/ | archive-url=https://web.archive.org/web/20201029221030/https://expressdigest.com/portable-two-way-radio-poc-radios-vs-walkie-talkies/ | archive-date=October 29, 2020 | url-status=live }}</ref> Compared to the latter, the former has a wider range of channels, covers a wider area, and does not require a license to transmit.<ref name="Portable Two-Way Radio: PoC Radios vs. Walkie Talkies"/> In addition, a PoC radio supports advanced functions, such as, video calls, multimedia messages, GPS location tracking, and emergency notifications.<ref>{{cite web | title=IDIS acquires KT Powertel to extend secure mobile comms and IoT capability - Security and Fire News and Resources | website=IFSEC Global | date=February 5, 2021 | url=https://www.ifsecglobal.com/video-surveillance/idis-acquires-kt-powertel/ }}</ref>
PoC radios are widely used in private security, logistics, hospitality, and rescue. The representative manufacturers of such equipment includes Hytera<ref name="Fox 2022">{{cite web | last=Fox | first=Jena Tesse | title=Hytera US launches new communications device | website=Hotel Management | date=May 26, 2022 | url=https://www.hotelmanagement.net/tech/hytera-us-launches-new-communications-device }}</ref> and ToooAir.<ref>{{cite web | author=Sharon O'Keeffe | title=ToooAir release "push to talk over cellular" (PTToC) transceiver | website=Queensland Country Life | date=November 28, 2017 | url=https://www.queenslandcountrylife.com.au/story/5085725/two-way-style-powered-by-telstra-network/ | archive-url=https://archive.today/20220830114302/https://www.queenslandcountrylife.com.au/story/5085725/two-way-style-powered-by-telstra-network/ | archive-date=August 30, 2022 | url-status=live}}</ref> Mission-critical PTToC (MCPTT) is also starting to be employed in sectors such as public safety, transportation, and utilities.<ref>{{Cite web |title=MCPTT & Broadband PTT Market |url=https://www.snstelecom.com/mcptt |access-date=2025-04-07 |website=www.snstelecom.com |language=en-US}}</ref>
==History== The concept of PoC was introduced by U.S. telecommunications company Nextel in 1987.<ref name="The push-to-talk ecosystem: Cellular, Wi-Fi, and unified platforms">Ty Estes. {{cite web | title=The push-to-talk ecosystem: Cellular, Wi-Fi, and unified platforms | website=Security Magazine | date=January 26, 2021 | url=https://www.securitymagazine.com/articles/94433-the-push-to-talk-ecosystem-cellular-wi-fi-and-unified-platforms | archive-url=https://archive.today/20220824115530/https://www.securitymagazine.com/articles/94433-the-push-to-talk-ecosystem-cellular-wi-fi-and-unified-platforms | archive-date=2022-08-24 | url-status=live}}</ref> The first commercial use of PoC radios was also started by the company in 2002.<ref>Thomas Plevyak, Veli Sahin. {{cite book | title=Next Generation Telecommunications Networks, Services, and Management | publisher=Wiley | year=2011 | isbn=978-1-118-21142-7 | url=https://books.google.com/books?id=KgTV8OvjpHwC&pg=PT157 | pages=157–}}</ref>
In June 2005, the Open Mobile Alliance rolled out an approved standard called "PoC 1.0".<ref>{{cite web | title=Cell 'walkie-talkie' standard approved | website=Computerworld | date=June 21, 2006 | url=https://www.computerworld.com/article/2820915/cell--walkie-talkie--standard-approved.html | author=Stephen Lawson }}</ref> In April 2020, Hytera presented a PoC radio named PNC550, equipped with a 5-inch touchscreen that supports full operation using gloves.<ref>{{cite web | title=Hytera new solution assists COVID-19 frontliners detect abnormal body temperature | date=April 14, 2020 | url=https://borneobulletin.com.bn/hytera-new-solution-assists-covid-19-frontliners-detect-abnormal-body-temperature/ |work=Borneo Bulletin}}</ref> ==References== {{reflist}} Category:American inventions Category:Radio communications Category:Mobile telecommunications user equipment