Time-Frequency Encyclopedia

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2021

Zhongxin Chuang has provided a clock synchronization server to the Guangxi Branch of the China Construction Bank.

Recently, the Guangxi Branch of China Construction Bank issued a tender for time servers. Beijing Zhongxin Chuang Co., Ltd. proactively collaborated with the client to develop a detailed proposal and recommended its independently developed and manufactured DNTS‑9 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 contract for the time‑synchronization server project from the Guangxi Branch of China Construction Bank.

China Construction Bank Guangxi Branch, officially known as China Construction Bank Corporation Guangxi Zhuang Autonomous Region Branch It is a first-tier branch under the China Construction Bank. Over the years, the Guangxi Branch of China Construction Bank has consistently regarded supporting Guangxi’s economic development as its mission, and, in tandem with the region’s economic growth and social progress, it has steadily strengthened its own capabilities.

The Guangxi Branch of the China Construction Bank has adopted the independently developed by Zhongxin Chuang. DNTS-9 The time server underwent rigorous testing, and the results consistently exceeded the specified performance criteria. We are highly satisfied with both the product quality and the after-sales service, and have proceeded smoothly with procurement and deployment.

The DNTS-9 network time server, developed by Beijing Zhongxinchuang Technology Co., Ltd., is an intelligent, high-precision NTP network time server. The DNTS-9 obtains standard time information from navigation and positioning satellite systems such as GPS, BeiDou, GLONASS, and Galileo, and provides standard time services over the network via NTP/SNTP or other network protocols. Devices in the network that require time synchronization—such as personal computers, servers, and controllers—can synchronize with international standard time.

When used in conjunction with GNSS satellite receivers, priority can be configured; the system supports single‑receiver/dual‑receiver and single‑antenna/dual‑antenna configurations, with each receiver capable of operating in standalone or combined timing modes. If both receivers and all other available time sources lose signal, the DNTS‑9 relies on its built-in temperature‑compensated crystal oscillator or rubidium atomic clock to maintain accurate timekeeping, while continuously providing time services to external users.

DNTS-9 In addition to serving as a primary network time‑synchronization device, it can also function as a secondary time server, enabling more effective time synchronization in large‑scale network environments. It can provide precise, standardized time signals for systems such as distributed networks, computer security systems, file management systems, e‑commerce platforms, online B2B systems, and the storage and maintenance of cloud databases. It has been successfully deployed across government, finance, mobile telecommunications, public security, petroleum, power, transportation, industrial, and defense sectors.

DNTS-9 Installing and using a network time server is extremely straightforward: simply connect the satellite receiving antenna and plug the network port into a network switch to enable time synchronization across all devices on the network.

Network protocol	NTP v1.v2.v3&v4(RFC1119&1305) SNTP(RFC2030) Authentication (RFC1321) Telnet (RFC854) UDP NTP Unicast, Broadcast, Multicast, Autokey TIME (RFC868) FTP (RFC959) DAYTIME (RFC867) DHCP (RFC2131)
	HTTP/SSL/HTTPS (RFC2616) SSH/SCP (Internet Draft) SNMP v1, v2c, and v3, MIB II (RFC1213), RSA asymmetric encryption, MD5 authentication, SHA authentication, AES encryption, DES encryption, RC4 encryption
	IPV4 , IPv6, IPv4/IPv6 Hybrid
	Supports NTP Peer Client/Server, Broadcast, and Multicast
Server performance	GNSS Reference mode, primary network time server, internal synchronization accuracy of 20 ns.
	User terminal synchronization timing accuracy: 0.1–2 ms (typical value on a local area network)
	User capacity: Supports tens of thousands of clients.
	NTP Request rate: 20,000 requests per second per network port (national time‑keeping center test report available)
	It can be used as a client to synchronize with other NTP network time servers.
	Supports logging up to 100,000 entries.
	High-performance, wide-temperature server motherboard, based on a deeply customized Linux operating system, suitable for a variety of demanding operating environments.
	1pps Signal and UTC (NTSC) master clock 1 pps signal, Timekeeping accuracy ( 24 Hourly average ) ≤5 ns (National Time Service Center test report available)
	1pps Signal and UTC (NTSC) master clock 1 pps signal, Time‑keeping stability ( 24 Hourly standard deviation ) ≤10 ns (National Time Service Center test report available)
	Temperature‑compensated crystal oscillator (optional, depending on model): Timing accuracy: standard configuration better than 8.6 µs/day (optional, depending on model). Frequency accuracy: less than 1× for a 10 MHz signal. 10^-12
Receiver	72 Channel‑based timing GNSS receiver, with optional multi‑source time synchronization via GPS, BDS, GLONASS, Galileo, 4G, and CDMA. Users can manually select single-GPS, single-Beidou, or dual-satellite mode (GPS + Beidou) via command.
	UTC Synchronization accuracy: 20 ns (RMS)
	Tracking and lock‑on sensitivity can reach −166 dBm.
Security Assurance	It allows flexible selection of leap-second handling mechanisms, ensuring timely and secure processing of leap-second events to enable a safe and stable system transition.
	Encryption method: Supports the MD5 security authentication protocol; supports certificate-based encryption protocol. The system supports user authentication and access control capabilities.
	Supports single-machine multi-NIC bonding for redundancy.
	High reliability, MTBF Time: 90,000 hours
Management approach	Supports management via SSH, Telnet, Web, SNMP, and DNTS‑Manager, enabling easy remote network login, administration, configuration, and maintenance.

\* MERGEFORMAT

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

The People’s Bank of China, China Construction Bank, China Merchants Bank, CITIC Bank, Shanghai Pudong Development Bank, Jiangsu Bank, Hubei Rural Credit Union, Postal Savings Bank of China, Bank of China Beijing Branch, Bank of China Xi’an Branch, Bank of Changsha Co., Ltd., Baoshang Bank Co., Ltd., Chongqing Fumin Bank, China UnionPay Center in Shanghai, Taizhou Commercial Bank Co., Ltd., China Southern Asset Management Co., Ltd., Dubang Property Insurance Co., Ltd., Xinhua Life Insurance, Zhejiang Pinghu Rural Cooperative Bank, Huarong Xiangjiang Bank, Nanxun Rural Cooperative Bank, Deqing Rural Cooperative Bank, Huzhou Wuxing Rural Cooperative Bank, Liaoning Provincial Rural Credit Cooperatives, Beijing Rural Credit Cooperatives, Rural Credit Union Funds Clearing Center, Zhejiang Provincial Credit Union Federation, Guangxi Rural Credit Cooperatives, Jiaxing Hecheng Commercial Bank, Zhejiang Provincial Rural Credit Cooperatives, Yunnan Longchuan Rural Commercial Bank Co., Ltd., 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 clock synchronization server to Hubei Radio and Television Station.

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Zhongxin Chuangwei provides a clock synchronization server to Hubei Radio and Television Station.

Zhongxin Chuang has provided a time synchronization server to the 45th Research Institute of China Electronics Technology Group Corporation.