Public Radio Service

PRS409 channels  Channel | Frequency [MHz]

|

1 | 409.7500
2 | 409.7625
3 | 409.7750
4 | 409.7875
5 | 409.8000
6 | 409.8125
7 | 409.8250
8 | 409.8375
9[lower-alpha 1] | 409.8500
10 | 409.8625
11 | 409.8750
12 | 409.8875
13 | 409.9000
14 | 409.9125
15 | 409.9250
16 | 409.9375
17 | 409.9500
18 | 409.9625
19 | 409.9750
20 | 409.9875

Public Radio Service (PRS) (Chinese: 公众对讲机; pinyin: Gōngzhòng duìjiǎngjī) is a walkie-talkie personal radio service in the mainland of China, Hong Kong and Macau, but excluding Taiwan. It can be used without a license, and no fees are charged for the use of the frequencies.[1] It uses 409 MHz. It is also known as PRS409.[2] It is similar to the American and Canadian Family Radio Service (FRS) and PMR446 in the European Union.

## Contents

* 1 Technical information
* 2 See also
* 3 Notes
* 4 References

## Technical information

The PRS radio channels use narrow-band frequency modulation (NBFM) with a maximum deviation of 2.5 kHz. The channels are spaced at 12.5 kHz intervals. They are limited to 500 milliwatts effective radiated power.

PRS radios are not allowed to be used at airports and onboard aircraft. They are not allowed to be connected to the public switched telephone network or cellular network.[1]

## See also

* 70-centimeter band
* CDCSS
* Continuous Tone-Coded Squelch System (CTCSS)
* Family Radio Service (the equivalent of PRS in Canada, the US, and some other countries)
* General Mobile Radio Service
* KDR 444
* LPD433
* Multi-Use Radio Service
* Personal radio service
* Personal radio service
* UHF CB

## Notes

1. ↑ The Hong Kong Radio Association lists this channel as a rescue channel.

## References

1. ↑ 1.0 1.1 "使用公众对讲机有哪些规定和要求？ _ 无线电 _ 省工信厅". https://gxt.fujian.gov.cn/zmhd/cjwt/wxd/202308/t20230831_6247372.htm.
2. ↑ 微功率(短距离)无线电发射设备的技术要求 （信部无 [2005]423 号文件） (trans-title:Technical requirements for micropower (short range) radio transmitting equipment) page 8

* v
* t
* e

Two-way radio

Amateur and hobbyist|

* Amateur radio
* Amateur radio repeater
* Citizens band radio
* Family Radio Service
* Public Radio Service
* General Mobile Radio Service
* KDR 444
* LPD433
* Mobile rig
* Multi-Use Radio Service
* PMR446
* UHF CB (Australia)

Aviation
(aeronautical mobile)|

* Air traffic control
* Aircraft emergency frequency
* Airband
* Common traffic advisory frequency
* Mandatory frequency airport
* MULTICOM
* Single Frequency Approach
* UNICOM

Land-based commercial
and government mobile|

* Base station
* Business band
* Mobile radio
* Professional mobile radio
* Radio repeater
* Specialized Mobile Radio
* Trunked radio system
* Walkie-talkie

Marine (shipboard)|

* 2182 kHz
* 500 kHz
* Coast radio station
* Marine VHF radio
* Maritime mobile amateur radio

Signaling /
Selective calling|

* CTCSS
* D-STAR
* Dual-tone multi-frequency
* MDC-1200
* Push-to-talk
* Quik-Call I
* Quik-Call II
* Selcall
* SELCAL

System elements
and principles|

* Antenna
* APRS
* Automatic vehicle location
* Call sign
* CAD
* DC remote
* Dispatch
* Dynamic range compression
* Fade margin
* Link budget
* Rayleigh fading
* Tone remote
* Radiotelephony procedure
* Voting (diversity combining)

* v
* t
* e

Telecommunications

History|

* Beacon
* Broadcasting
* Cable protection system
* Cable TV
* Communications satellite
* Computer network
* Data compression
* audio
* DCT
* image
* video
* Digital media
* Internet video
* online video platform
* social media
* streaming
* Drums
* Edholm's law
* Electrical telegraph
* Fax
* Heliographs
* Hydraulic telegraph
* Information Age
* Information revolution
* Internet
* Mass media
* Mobile phone
* Smartphone
* Optical telecommunication
* Optical telegraphy
* Pager
* Photophone
* Prepaid mobile phone
* Radio
* Radiotelephone
* Satellite communications
* Semaphore
* Semiconductor
* device
* MOSFET
* transistor
* Smoke signals
* Telecommunications history
* Telautograph
* Telegraphy
* Teleprinter (teletype)
* Telephone
* The Telephone Cases
* Television
* digital
* streaming
* Undersea telegraph line
* Videotelephony
* Whistled language
* Wireless revolution

Pioneers|

* Nasir Ahmed
* Edwin Howard Armstrong
* Mohamed M. Atalla
* John Logie Baird
* Paul Baran
* John Bardeen
* Alexander Graham Bell
* Tim Berners-Lee
* Jagadish Chandra Bose
* Walter Houser Brattain
* Vint Cerf
* Claude Chappe
* Yogen Dalal
* Donald Davies
* Lee de Forest
* Philo Farnsworth
* Reginald Fessenden
* Elisha Gray
* Oliver Heaviside
* Erna Schneider Hoover
* Harold Hopkins
* Internet pioneers
* Bob Kahn
* Dawon Kahng
* Charles K. Kao
* Narinder Singh Kapany
* Hedy Lamarr
* Innocenzo Manzetti
* Guglielmo Marconi
* Robert Metcalfe
* Antonio Meucci
* Jun-ichi Nishizawa
* Radia Perlman
* Alexander Stepanovich Popov
* Johann Philipp Reis
* Claude Shannon
* Henry Sutton
* Nikola Tesla
* Camille Tissot
* Alfred Vail
* Charles Wheatstone
* Vladimir K. Zworykin

Transmission
media|

* Coaxial cable
* Fiber-optic communication
* optical fiber
* Free-space optical communication
* Molecular communication
* Radio waves
* wireless
* Transmission line
* data transmission circuit
* telecommunication circuit

Network topology
and switching|

* Bandwidth
* Links
* Nodes
* terminal
* Network switching (circuit
* packet)
* Telephone exchange

Multiplexing|

* Space-division
* Frequency-division
* Time-division
* Polarization-division
* Orbital angular-momentum
* Code-division

Networks|

* ARPANET
* BITNET
* Cellular network
* Computer
* CYCLADES
* Ethernet
* FidoNet
* Internet
* Internet2
* ISDN
* LAN
* Mobile
* NGN
* NPL network
* Public Switched Telephone
* Radio
* Telecommunications equipment
* Television
* Telex
* WAN
* Wireless network
* World Wide Web

* Category
* Outline
* Portal
* Commons

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