Time-Frequency Encyclopedia

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2023

Zhongxin Chuangwei provides clock synchronization equipment to Shanghai Tieda Telecommunications Technology.

Recently ， Shanghai Tieda Telecom Technology issued a request for a time server. Beijing Zhongxin Chuang promptly collaborated to develop a detailed proposal and recommended its self‑developed and manufactured DNTS‑8 time server as the product for this tender. Following a fiercely competitive bidding process, Zhongxin Chuang stood out by offering high‑quality products and comprehensive after‑sales service, ultimately securing the contract over competitors’ offerings. And out, Awarded by Shanghai Tieda Telecommunications Technology Time Synchronize server project.

Shanghai Tieda Telecommunications Technology Co., Ltd. was established in 1992 Year is a high-tech enterprise integrating the R&D, manufacturing, sales, and service of railway, urban rail, and subway signaling systems. To ensure product quality, the company has established a comprehensive quality management system; our company… 1998 Passed in the year ISO9001 Following certification of the quality assurance system, in 2019 it was comprehensively updated and upgraded to international standards: the Quality Management System, the Environmental Management System, and the Occupational Health and Safety Management System. 2017 Passed in the year CMMI Level-3 assessment, holding Level-3 qualification for computer information system integration. Shanghai Tieda Telecommunications Technology Developed independently by Zhongxin Chuang DNTS-8 The time server underwent a thorough evaluation, with test results exceeding the specified performance criteria. We are highly satisfied with both the product quality and the after-sales service, and have successfully procured and put it into operation.

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 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-8 relies on its built-in temperature-compensated crystal oscillator for timekeeping, achieving a timing accuracy of up to 1E-9. The DNTS-8 uses standard clock information transmitted over TCP/IP networks and supports multiple popular time‑broadcasting protocols, including NTP and time/UDP; it can also accommodate custom‑defined time‑broadcast packets from Zhongxinchuang Technology 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; 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	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 Month (01...12) 04...05 Day (01...31) 06...07 Hour (00...23) 08...09 points (00...59) 10...11 Seconds (always 00) 12 Day of the week (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 UNIX timestamp in GMT 24...31 All 0

With 21 years of industry experience, our company has established a strong corporate reputation and brand image, serving clients across various sectors, including:

Shenzhen: Huawei, ZTE Corporation, Ericsson, Datang, Digital China (China) Co., Ltd., Unisplendour Corporation Limited, Shanghai Bell, Honeywell (China) Co., Ltd., Yokogawa Electric (China) Co., Ltd., Emerson (China) Motor Co., Ltd., Nokia, Siemens (China) Co., Ltd. ABB China, Schneider Electric (China) Co., Ltd., Zhejiang Dahua Group, Sail Network Technology Co., Ltd., Qingdao Hisense Network Technology Co., Ltd., Fujian Newland Software Engineering Co., Ltd., Beijing HuaSheng TianCheng Technology Co., Ltd., Fujian Rongji Software Co., Ltd., Shanghai Baoxin Software Co., Ltd., Shanghai Tianbai Broadband Network Technology Co., Ltd., China National Tobacco (Yunnan) Reconstituted Tobacco Leaf Co., Ltd., Chongqing Cigarette Factory, BOE, Lenzing (Nanjing) Fibers Co., Ltd., Taiwan’s Formosa Plastics, Weihai Triangle Tire, Henan Huayuan Photovoltaic Technology, Jiaxing Duoneng Automation Equipment Co., Ltd., Tangshan Sanyou Chlor-Alkali Company, Inner Mongolia Desheng Blast Furnace Overhaul Project, 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 Chuangwei provides a precision clock to Nanjing Enruite Industrial Co., Ltd.

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Zhongxin Chuangwei provides a precision clock to Nanjing Enruite Industrial Co., Ltd.

Zhongxin Chuangwei has provided NTP clock synchronization equipment to the Nanning Railway Bureau’s dispatching center.