Time-Frequency Encyclopedia

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2020

Zhongxin Chuangwei provides a precision clock to the Chengdu Railway Bureau.

Zhongxin Chuangwei provides a precision clock to the Chengdu Railway Bureau.

Recently, China Railway Chengdu Group Co., Ltd. issued a tender for time servers. Beijing Zhongxin Chuang promptly collaborated to develop a detailed proposal and recommended its self‑developed and manufactured DNTS‑82‑RGB clock server as the bid‑winning product. Following a fiercely competitive bidding process, Zhongxin Chuang stood out thanks to its high‑quality products and comprehensive after‑sales service, ultimately securing the contract for the clock synchronization equipment project from China Railway Chengdu Group.

China Railway Chengdu Group Co., Ltd. is China State Railway Group Co., Ltd. One of the 18 railway bureaus under the administration of China Railway, commonly referred to as “Cheng Bureau,” it is located in Southwest China, with a jurisdiction that extends across Sichuan, Guizhou, Chongqing, Zhaotong in Yunnan, and Enshi in Hubei.

China Railway Chengdu Group conducted an in-depth evaluation of the DNTS-82-RGB clock server, independently developed by Zhongxin Chuang. The results consistently exceeded the specified performance parameters, and the company expressed high satisfaction with both the product’s quality and its after-sales service, leading to a successful procurement and deployment.

The DNTS-82-RGB 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-82-RGB time server acquires standard clock signal information from GPS or BeiDou 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 both GPS and BeiDou receivers are in use, a priority can be set; by default, BeiDou takes precedence, with GPS serving as a backup. If neither receiver has a signal, the DNTS-84-OGB relies on its built-in temperature-compensated crystal oscillator for timekeeping, achieving a timing accuracy of up to 1E-9. The DNTS-82-RGB disseminates standard clock information via TCP/IP networks, while the DNTS-84-0GB supports multiple popular time‑broadcasting protocols, including NTP and time/UDP, and also accommodates custom time‑broadcast packets defined by Zhongxinchuang Technology, 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-82-RGB 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 the time in two lines, with 20 characters per line, showing the current time, the number of satellites, and the device’s operating status. LEDs indicate power status, satellite lock status, holdover 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 rubidium atomic clock achieving an accuracy better than 1E-12.
Encryption Verification	Provides MD5 encryption verification functionality.
Network management functions	It features comprehensive SNMP network management capabilities.
Feature Extension	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.

With 18 years of extensive industry experience, our company has established a strong corporate reputation and brand image, serving clients in the transportation sector, including:

The Ministry of Railways of the People’s Republic of China, China Railway Signal & Communication Group, Civil Aviation Administration of China, Shandong Provincial Department of Transportation, Beijing Railway Bureau, Shanghai Railway Bureau, Guangzhou Railway Bureau, Zhengzhou Railway Bureau, Kunming Railway Bureau, Xinjiang Railway Bureau, Jinan Railway Bureau, Beijing Capital International Airport, Shandong Air Traffic Management Bureau, Dalian Air Traffic Management Bureau, Kunming Air Traffic Management Bureau, Xinjiang Air Traffic Management Bureau, Wenzhou Air Traffic Management Bureau, Chongqing Air Traffic Management Bureau, Chengdu Air Traffic Management Bureau, Zhoushan Port and Shipping Administration, Information Center of the Sichuan Provincial Department of Transportation, Beijing All-Rail Communications and Signaling Research & Design Institute Co., Ltd., China Shipbuilding Industry Corporation, Hebei Expressway, Langfang Expressway Toll Station, Wuhan Expressway ETC, Yinzhou Highway Management Section, Meishan Section of the Ying‑Guang‑Hong Expressway, Xinjiang’s project to abolish provincial border toll stations on expressways, National Expressway De‑Shang Line, An‑Lin Expressway’s project to eliminate provincial border toll stations, Shuo‑Huang Railway Development Co., Ltd., 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 Heilongjiang Provincial Museum.

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Zhongxin Chuangwei provides a precision clock to the Heilongjiang Provincial Museum.

Zhongxin Chuangwei provides a precision clock to Inner Mongolia Desheng Industrial Group.