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2021

Zhongxin Chuangwei provides clock synchronization servers for the Harbin Metro.

Zhongxin Chuangwei provides clock synchronization servers for the Harbin Metro.

Recently, the Harbin Metro issued a request for proposals for a time‑server. Beijing Zhongxin Chuang promptly collaborated to develop a detailed solution and recommended its self‑developed and manufactured DNTS‑812‑OGB model, along with digital sub‑clocks, as the bid‑eligible products. Following a highly competitive bidding process, Zhongxin Chuang stood out thanks to its high‑quality offerings and comprehensive after‑sales service, ultimately securing the contract for the Harbin Metro’s time‑synchronization server project.

The Harbin Metro refers to the system serving… China Heilongjiang Province Harbin City and the Harbin Metropolitan Area’s Urban Rail Transit Its first line commenced trial operations on September 26, 2013, making Harbin the first city in China to operate a subway system designed for extremely cold climates. [1]

Harbin Metro conducted an in-depth evaluation of the DNTS-8 time server, independently developed by Zhongxin Chuang. The results consistently exceeded the specified performance parameters, and the metro expressed strong satisfaction with both our product quality and after-sales service, leading to a successful procurement and deployment.

The DNTS-8 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-8 time server obtains 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 defined; by default, BeiDou takes precedence, with GPS serving as a backup. If neither receiver receives a signal, the DNTS-8 relies on its built-in temperature-compensated crystal oscillator for timekeeping, achieving a timing accuracy of up to 1E-9. The DNTS-8 disseminates standard clock information via TCP/IP networks and supports multiple popular time‑broadcasting protocols, including NTP and time/UDP, as well as Zhongxinchuang’s proprietary time‑broadcast data 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-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; 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, holdover operation, alarms, and NTP validity.
Throughput	It can handle 20,000 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 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 industry experience, our company has established a strong corporate reputation and brand image, serving clients in the energy and steel sectors, as well as:

Sinopec, Shanghai Petrochemical, Tianjin Petrochemical, Yanshan Petrochemical, Zhanjiang Petrochemical, Langfang Petrochemical, Gansu Petrochemical, Anqing Petrochemical, Zhongyuan Petrochemical, Daqing Oilfield, Daqing Refining & Chemical, Qinshan Nuclear Power Plant, Kunlun Gas, Hope Gas, PetroChina Yellow Sea Storage Base, Beijing Shougang Co., Ltd., Hebei Shougang Qian’an Iron & Steel Co., Ltd., Fujian Sangang Mingguang Co., Ltd., Angang Steel Co., Ltd., Chongqing Iron & Steel (Group) Co., Ltd., Tianjin Jinwanhang Petroleum Materials & Equipment Co., Ltd., Daqing Petrochemical, China National Petroleum Corporation Qingyang Petrochemical Company, Tarim Oilfield, Tianjin Petrochemical, Yangzi Petrochemical, Sino‑Saudi (Tianjin) Petrochemical, Zhongyuan Petrochemical, North China Petroleum Communications Co., Ltd., Wuhan Iron & Steel Group Co., Ltd., Shaanxi Yulin Energy Group, China Huaneng Group, China General Nuclear Power Group, Yankuang Group, the China–Russia East Pipeline, and others.

The choice of numerous departments and enterprises reflects recognition of Zhongxin Chuang’s products and services. By working in close collaboration with partners across all sectors, we are jointly advancing toward win‑win outcomes for businesses and society alike!

Zhongxin Chuang has provided NTP clock synchronization equipment to China National Petroleum Corporation.

Zhongxin Chuangwei provides a clock synchronization server to Beijing Traditional Chinese Medicine Hospital.

Zhongxin Chuang has provided NTP clock synchronization equipment to China National Petroleum Corporation.

Zhongxin Chuangwei provides a clock synchronization server to Beijing Traditional Chinese Medicine Hospital.