Time-Frequency Encyclopedia

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2020

Zhongxin Chuangwei provides a precision clock to the National Ocean Technology Center.

Zhongxin Chuangwei provides a precision clock to the National Ocean Technology Center.

Recently, the National Ocean Technology Center issued a request for proposals for a time server. Beijing Zhongxin Chuang Co., Ltd. proactively collaborated to develop a detailed solution and recommended its self‑developed and manufactured DNTS‑81‑OG clock server as the bid‑winning product. Following a highly competitive bidding process, Zhongxin Chuang stood out thanks to its high‑quality products and comprehensive after‑sales service, ultimately securing the contract for the National Ocean Technology Center’s clock synchronization project.

The National Ocean Technology Center was established in 1965 and is affiliated with… Ministry of Natural Resources of the People’s Republic of China A national public-interest institution located in Tianjin.

The National Ocean Technology Center conducted an in-depth evaluation of the DNTS-81-OG clock server, independently developed by Zhongxin Chuang. The results consistently exceeded the specified performance parameters, and the center expressed high satisfaction with both our product quality and after-sales service, leading to a successful procurement and deployment.

The DNTS-81-OG time server, developed by Beijing Zhongxinchuang Technology Co., Ltd., is a high-tech, intelligent, stand-alone clock synchronization server that operates based on the NTP/SNTP protocols and delivers high precision. The DNTS-81-OG time server obtains standard clock signal information from GPS geostationary satellites and transmits this information across the network, enabling devices requiring time signals—such as computers and controllers—to synchronize with the standard clock. When all receivers lose signal, the DNTS-81-OG relies on its built-in temperature-compensated crystal oscillator for timekeeping, achieving a timing accuracy of up to 1E-9. The DNTS-81-0G disseminates standard clock information via TCP/IP networks and supports multiple popular time‑broadcasting protocols, including NTP and time/UDP; it also accommodates custom‑defined time‑broadcast packets with 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-81-0G 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; even when satellite signals are lost, it continues to output a standard time signal.
Liquid crystal display	LCD displays time in two lines of 20 characters each, showing the current time, the number of satellites, and the device’s operating status. LEDs indicate power status, satellite lock status, hold‑over operation, alarms, and NTP validity.
Throughput	Can handle 2,000 time requests per second per port.
Local Alarm	Supports SNMP alarms, local dry-contact alarm output, current rating 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	Even when satellite signals are lost, it must still output a standard time signal, with the temperature-compensated crystal oscillator achieving an accuracy of better than 1 × 10⁻¹².
Encryption Verification	Provides MD5 encryption verification functionality.
Network management functions	It features comprehensive SNMP network management capabilities.
Feature Expansion	Supports expanding to select other functional modules.
Settings Management	Supports configuration and management via web pages, Telnet, and other methods.
Timekeeping Record	Time‑synchronization logs can be viewed via the web interface and Telnet; the installed software can store an unlimited number of records.
UDP operating mode	Provides the UDP broadcast protocol, enabling connection to electronic clock LED displays. You can configure at least eight UDP remote IP addresses and port numbers: Output the newly created science and technology time data packet: A total of 32 bytes, with the following details: Offset Description 00...01 year (00...99) 02...03 months (01...12) 04...05 day (01...31) 06...07 hours (00...23) 08...09 points (00...59) 10...11 seconds (always 00) 12 weeks (1-Mon, 2-Tue, ...) 13 Daylight Saving Time Flag (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 GMT time in UNIX format 24...31 All 0

With 18 years of industry experience, our company has established a strong corporate reputation and brand image, serving government agencies as well as:

The Institute of Physics of the Chinese Academy of Engineering, the Ministry of Railways of the People’s Republic of China, the Supreme People’s Court of the People’s Republic of China, the Communications Department of the Headquarters of the People’s Armed Police Force of China, the National Astronomical Observatory of the Chinese Academy of Sciences, the State-owned Assets Supervision and Administration Commission of the State Council, the China Academy of Launch Vehicle Technology, the Tianma Radio Telescope of the Chinese Academy of Sciences, the National Radio and Television Monitoring Center, the State Administration of Radio, Film, and Television, the State Grid Data Center, the National Radio Monitoring Center, the National Emergency Command Center, the Civil Aviation Administration of China, the Detection Center of the China Meteorological Administration, the China Arctic Yellow River Station, the China Welfare Lottery Center, the Great Wall Museum of China, the Political and Legal Committee of the CPC Hebei Provincial Committee, China Aerospace Information Co., Ltd., the Anhui Provincial Seismological Bureau, the Anhui Provincial Supervisory Commission, the Beijing Municipal Planning Commission, the Palace Museum in Beijing, the Summer Palace in Beijing, the Forest Fire Prevention Command Center of the Beijing Municipal Parks Bureau, the Beijing Municipal Economic Information Center, the People’s Court of Miyun District in Beijing, the Shanxi Provincial Department of Finance, the Tianjin Municipal Bureau of Finance, the Xiqing District Bureau of Finance, the Nankai District People’s Procuratorate of Tianjin, as well as the Beijing Mentougou Science and Technology Museum, the Public Resources Trading Center of Yuncheng City in Shanxi Province, the Chongqing Welfare Lottery Center, and others.

The choice of numerous departments and enterprises reflects recognition of Zhongxin Chuang’s products and services. Our company will continue to uphold our corporate mission of “Innovative Technology, Serving a Better Life,” working in sincere collaboration with partners across all sectors to jointly achieve win‑win outcomes and shared progress for both the enterprise and society.

Zhongxin Chuangwei provides a precision clock to the Fifth People’s Hospital of Jinan City.

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Zhongxin Chuangwei provides a precision clock to the Fifth People’s Hospital of Jinan City.

Zhongxin Chuangwei provides a precision clock to the Yangpu District Traditional Chinese Medicine Hospital in Shanghai.