Time-Frequency Encyclopedia

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2019

Zhongxin Chuangwei provides precision timing clocks for the Shuohuang Railway Development Co., Ltd. project.

Zhongxin Chuangwei provides precision timing clocks for the Shuohuang Railway Development Co., Ltd. project.

Recently, the Shuohuang Railway Development Co., Ltd. issued a procurement request for time servers. Beijing Zhongxin Chuang promptly collaborated to develop a detailed proposal and recommended its self‑developed and manufactured DNTS‑82 model 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 time‑synchronization project from Shuohuang Railway Development Co., Ltd.

Shuohuang Railway Development Co., Ltd. was established on February 18, 1998, with a registered capital of RMB 5.88 billion. It is jointly funded and held by China Shenhua Energy Company Limited, Datong–Qinhuangdao Railway Co., Ltd., and Hebei Jiantou Transportation Investment Co., Ltd. (China Shenhua holds a 52.72% stake, Datong–Qinhuangdao Railway holds 41.16%, and Hebei Jiantou holds 6.12%).

Shuohuang Railway Development Co., Ltd. conducted an in-depth evaluation of the DNTS‑82‑RG time server independently developed by Zhongxin Chuang. The results consistently exceeded the specified performance parameters, and the company expressed high satisfaction with both our product quality and after-sales service, leading to a successful procurement and deployment.

The DNTS-82-RG 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-RG obtains standard clock signal information from GPS satellites and transmits this data across the network, enabling devices requiring time signals—such as computers and controllers—to synchronize with the standard clock. When the receiver loses signal, the DNTS-82-RG relies on its built-in rubidium atomic clock for timekeeping, achieving a timing accuracy of up to 1E-12. The DNTS-82-RG uses standard clock information transmitted over TCP/IP networks, supporting multiple popular time‑broadcasting protocols, including NTP and time/UDP, and also accommodating Zhongxinchuang’s proprietary 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, while it also 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 tracked, 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 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.

With 17 years of extensive industry experience, our company has established a strong corporate reputation and brand image, serving clients in the railway sector, including:

Ministry of Railways of the People’s Republic of China, China Railway Signal & Communication Corporation, 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, 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, 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 close collaboration with partners across all sectors to jointly achieve win‑win outcomes and shared progress for both our enterprise and society.

Zhongxin Chuangwei provides clock synchronization equipment to Adisseo.

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Zhongxin Chuangwei provides clock synchronization equipment to Adisseo.

Zhongxin Chuangwei provides a precision clock to the Ar Horqin Banner Traditional Chinese Medicine Hospital.