Time-Frequency Encyclopedia

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2024

Zhongxin Chuangwei provides precise clock synchronization to the Shenyang Public Security Bureau.

Recently, The Shenyang Municipal Public Security Bureau has released a time server. of Demand , Beijing Zhongxin Chuang Company is actively cooperating For users A detailed plan has been prepared, and the independently developed and manufactured products of Zhongxin Chuang have been recommended. DNTS-8 Time Server As the product submitted for this tender, Zhongxin Chuang stood out by defeating competitors’ offerings thanks to its high‑quality products and comprehensive after‑sales service, ultimately… Awarded the Shenyang Municipal Public Security Bureau’s Time Synchronization Server Project.

The Shenyang Municipal Public Security Bureau implements the Party Central Committee’s principles, policies, and decisions on public security work, as well as the directives and requirements of the municipal and provincial Party committees, governments, and the Provincial Public Security Department. In the course of performing its duties, it upholds and strengthens the Party’s centralized and unified leadership over public security work.

Shenyang Municipal Public Security Bureau To China–Singapore Innovation Independently developed DNTS-8 Time server Conduct an in-depth evaluation and arrive at the final results. All are superior to the parameter requirements. ， And Regarding our company’s product quality and after-sales service Also quite satisfied. ， Procured successfully and put into use. ！

Developed by Beijing Zhongxinchuang Technology Co., Ltd. The DNTS‑8 time server is a high‑tech, intelligent, stand‑alone clock synchronization server that operates on the NTP/SNTP protocols and delivers high‑precision timekeeping. It obtains standard time‑signal data from GPS satellites and disseminates this information across the network, enabling devices requiring precise timing—such as computers and controllers—to synchronize with the reference clock. When all external signals are unavailable, the DNTS‑8 relies on its built‑in temperature‑compensated crystal oscillator for holdover, achieving a holdover accuracy of up to 1 × 10⁻⁹. The DNTS‑8 transmits standard time information over TCP/IP networks and supports multiple popular time‑distribution protocols, including NTP and time/UDP, while also accommodating custom‑defined time‑broadcast packets via configurable UDP ports. The port numbers for NTP and time/UDP are fixed at 123 and 37, respectively, as specified in RFC‑123 and RFC‑37. Additionally, the DNTS‑8 supports the broadcast mode of the SNTP protocol.

Product dimensions	19-inch 1U
Receiver	Built-in GPS Receiver
Built-in clock	Built-in temperature-compensated crystal oscillator, When satellite Even in the event of signal loss, a standard time signal must still be output.
Liquid crystal display	LCD displays the time, Two lines, each with 20 characters, display the time, number of satellites, and device operating status. LEDs indicate power status, satellite lock status, holdover operation, alarms, and NTP validity.
Throughput	Can meet per second Per bite 2 000 time requests
Local Alarm	Support SNMP alarm, local dry-contact alarm output, current 10A
Output interface	RS232/485, IRIG-B, 10M, 1PPS, 10 MHz sine wave output, BNC connector 1 PPS output, BNC connector IRIG-B code output, BNC interface IRIG-B code input, BNC interface RS232 output, supports the TL1 protocol.
Input interface	Serial port input; time can be set manually, and it can serve as an external clock source.
Timekeeping function	When satellite Even in the event of signal loss, a standard time signal must still be output, with a constant‑temperature crystal oscillator achieving an accuracy of 1E-12 The above
Encryption Verification	Provide MD5 encryption verification feature
Network management functions	There is a complete SNMP network management functionality;
Feature Extension	Supports expanding to select other functional modules.
Settings Management	Support Web page, Telnet, and other configuration management methods
Timekeeping Record	Can be accessed via the web and Use telnet to view the time synchronization log. , installing the software allows you to save countless records
UDP operating mode	Provide UDP broadcast protocol, capable of interfacing with electronic clock LED displays. Can be set to at least 8 UDP remote IP addresses and port numbers: Output the newly created science and technology time data packet: Total 32 bytes, with the following details: Offset Description 00...01 year (00...99) 02...03 month (01...12) 04...05 day (01...31) 06...07 Time (00...23) 08...09 point (00...59) 10...11 seconds (always 00) 12 Sunday English: (1-Mon, 2-Tue, ...) 13 Daylight Saving Time symbol (0-no, 1-yes) 14 String terminator , ‘\0‘ 15 String terminator , ‘\0‘ 16...19 32-bit CET/CST time in UNIX format 20...23 32-bit UNIX timestamp in GMT 24...31 All 0

After a long… With 18 years of industry experience, our company has established a strong corporate reputation and a robust brand image. Serving the public security sector The customer also has:

Ministry of Public Security of the People’s Republic of China, Beijing Municipal Public Security Bureau, Guangdong Provincial Public Security Department, Liaoning Provincial Public Security Department, Tianjin Municipal Public Security Bureau, Zhejiang Provincial Public Security Department, Hebei Provincial Public Security Department, Hubei Provincial Public Security Department, Sichuan Provincial Public Security Department, Xinjiang Uygur Autonomous Region Public Security Department, Jinan Municipal Public Security Bureau, Harbin Municipal Public Security Bureau, Kunming Municipal Public Security Bureau, Urumqi Municipal Public Security Bureau, Hohhot Municipal Public Security Bureau, Lhasa Municipal Public Security Bureau, Shenyang Railway Public Security Bureau, Lianyungang Municipal Public Security Bureau, Zhangjiagang Municipal Public Security Bureau, Shihezi Municipal Public Security Bureau, Kuitun Municipal Public Security Bureau, Changji Municipal Public Security Bureau, Hami Municipal Public Security Bureau, Turpan Municipal Public Security Bureau, Kelamayi Municipal Public Security Bureau, Rushan Municipal Public Security Bureau, Weihai Municipal Public Security Bureau, Baotou Municipal Public Security Bureau, Bazhou Municipal Public Security Bureau, Ili Municipal Public Security Bureau, Luzhou Municipal Public Security Bureau, Huzhou Municipal Public Security Bureau, Beihai Municipal Public Security Bureau, Hechi Municipal Public Security Bureau, Beijing Fangshan Municipal Public Security Bureau, Beijing Tongzhou Municipal Public Security Bureau, Heilongjiang Mudanjiang Traffic Police Detachment, Lu’an Municipal Traffic Police Detachment, Wuzhou Municipal Public Security Bureau, Guangxi Guilin Road Administration Law Enforcement Detachment, Hebei Expressway Traffic Police Corps, Yangchun Traffic Police Detachment, Ulanhot Traffic Police Detachment, Jianyang Traffic Police Detachment, Foshan Traffic Police Detachment, Hubei Jingzhou Traffic Management Bureau, and others.

The choice of numerous departments and enterprises reflects recognition of Zhongxin Chuang’s products and services, and demonstrates close collaboration with partners from all sectors. We sincerely look forward to collaborating to achieve mutual success and shared progress for both the enterprise and society!