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2023

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

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

Recently, the Dispatching Office of the Nanning Railway Bureau issued a requirement for a clock synchronization system. Beijing Zhongxin Chuang Company proactively collaborated to develop a detailed solution and recommended its self‑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 Nanning Railway Bureau’s time‑server project.

China Railway Nanning Group Co., Ltd. is one of the 18 railway bureau group companies under the administration of China State Railway Group Co., Ltd. It is commonly referred to as “Nanning Bureau,” and its predecessor was established in [23]. The Liuzhou Railway Bureau as of January 1, 1953; on November 16, 2007, the bureau’s headquarters moved from… Liuzhou Relocate to Nanning , renamed to Nanning Railway Bureau 。

The Dispatching Office of the Nanning Railway Bureau conducted an in-depth evaluation of the DNTS‑9 time server, independently developed by Zhongxin Chuang. The results consistently exceeded the specified performance parameters, and the bureau expressed strong satisfaction with both the product’s quality and our after-sales service, leading to a successful 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 either 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‑controlled crystal oscillator or rubidium atomic clock to maintain accurate timekeeping, continuously providing time services to external users.

In addition to serving as a primary‑level network time‑synchronization device, the DNTS‑9 can also function as a secondary‑level time server, enabling more effective time synchronization in large‑scale network environments. It provides precise standard time signals for systems such as distributed networks, computer security systems, file management systems, e‑commerce platforms, online B2B systems, and cloud database storage and maintenance. The DNTS‑9 has been successfully deployed across government, finance, mobile telecommunications, public security, petroleum, power, transportation, industrial, and defense sectors. Installation and operation of the DNTS‑9 network time server are straightforward: simply connect the satellite receiving antenna and link the network port to a network switch to achieve time synchronization across all devices on the network.

Network protocol	NTP v1, v2, v3, and v4 (RFC 1119 and RFC 1305), SNTP (RFC 2030), Authentication (RFC 1321), Telnet (RFC 854), UDP NTP Unicast, Broadcast, Multicast, Autokey, TIME (RFC 868), FTP (RFC 959), DAYTIME (RFC 867), DHCP (RFC 2131)
	HTTP/SSL/HTTPS (RFC 2616), SSH/SCP (Internet Draft), SNMP v1, v2c, and v3, MIB II (RFC 1213), RSA asymmetric encryption, MD5 authentication, SHA authentication, AES encryption, DES encryption, RC4 encryption.
	IPv4, IPv6, IPv4/IPv6 Hybrid
Timekeeping mode	Supports NTP Peer Client/Server Broadcast Multicast
Server performance	GNSS reference mode, Tier‑1 network time server, with an 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: 25,000 requests per second (per network port)
	It can be used as a client to synchronize with other NTP network time servers.
	Supports logging up to 100,000 entries and allows storage capacity to be expanded as needed.
Receiver	72-channel timing‑grade GNSS receiver, multi‑constellation GPS/BeiDou/GLONASS, supports RAIM, with optional CDMA support.
	UTC synchronization accuracy: 20 ns (RMS)
	Tracking and lock‑on sensitivity can reach −166 dBm.
Timekeeping function	Temperature‑compensated crystal oscillator (optional, depending on model): Timing accuracy: standard configuration better than 8.6 µs/day (configuration can be upgraded to meet specific requirements).
Timekeeping function	Rubidium atomic clock (optional depending on model): Timing accuracy: standard configuration better than 500 ns/day (configurable upgrades available to meet specific requirements).
Front panel	VFD high-brightness LCD display
	Displays GPS/BD satellite acquisition status, time, number of GPS/BD satellites, IP addresses of each network port, system operating status, and more.
	6 tri-color indicator lights: PWR, ANT, SAT, LOCK, NTP, ALARM
	Signals indicating power, antenna, satellite, lock, timing, and alarms.
Rear panel	GNSS antenna input: BNC, with 1–2 channels optional.
	NTP network port: 1–10 ports, with optional 10/100/1000 Mbps or 10 Gigabit Ethernet interfaces.
	Console-RS232: 1 port
	USB Interface: 1 to 8 channels optional, supports USB 2.0/3.0, with backup, restore, and upgrade functions.
	TOD: DB-91 bus, RS232/RS485 levels, capable of outputting time, position, number of satellites, and other information.
	ALARM dry-contact alarms: 1–6 pairs optional, including satellite, power supply, antenna, port capacity, and other alarm types.
	10M output: BNC, 1 channel, selectable sine wave or square wave, impedance: 50 ohms; frequency accuracy: <1E-12
	1 PPS output: BNC, TTL level, accuracy ≤ 10 ns (RMS)
	Dimensions: 1U/2U chassis
Physical Environment Parameters	Power Supply: AC 220 V ±20%, 47 Hz to 63 Hz; hot‑redundant power supply available as an option.
	Operating temperature: -10°C to +55°C (equipment), -40°C to +75°C (antenna)
	Storage temperature: -45°C to +85°C
	Humidity: 95% non-condensing

With 21 years of extensive industry experience, our company has established a strong corporate reputation and brand image, serving research institutes and other clients, including:

China Electric Power Research Institute, Institute of Physics of the Chinese Academy of Engineering, China Academy of Launch Vehicle Technology, China Institute of Atomic Energy, Nanjing Institute of Astronomical Optical Technology of the National Astronomical Observatories, Instrument Research Institute of the Nanjing Astronomical Observatory of the Chinese Academy of Sciences, Xichang Satellite Launch Center, the 54th Research Institute of China Electronics Technology Group Corporation, the 10th Research Institute of China Electronics Technology Group Corporation, the 15th Research Institute of China Electronics Technology Group Corporation, the 36th Research Institute of CETC, Taiyuan Satellite Launch Center, Beijing‑1 Satellite Ground Station, Shanghai Satellite Engineering Research Institute, China Putian, Shanghai Lizheng Satellite Application Technology Co., Ltd., Shanghai Small Satellite Engineering Center, and the Chongqing Transportation Science Research Institute of China Merchants Group, among others.

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

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

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

Zhongxin Chuangwei provides NTP clock synchronization equipment to CNOOC.