Time-Frequency Encyclopedia

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2023

Zhongxin Chuang provides time synchronization equipment to the Communication University of China.

Zhongxin Chuang provides time synchronization equipment to the Communication University of China.

Recently, Communication University of China has launched a time server. of Demand , Beijing Zhongxin Chuang Company is actively cooperating For users A detailed plan has been prepared, and the independently developed and manufactured products of Zhongxin Chuang have been recommended. DNTS-6 Time Server and DNZD Digital Sub-Clock As the winning bid product in this tender, Zhongxin Chuang stood out by defeating competitors’ offerings thanks to its high‑quality products and comprehensive after‑sales service. Awarded the China Media University Real-Time Synchronization Server Project.

Communication University of China is among the first batch of institutions directly under the Ministry of Education. A university under the “Double First-Class” initiative, a key institution in the “211 Project,” and a priority‑built university within the “985 Platform for Innovative Disciplines.” Founded in 1954, it was renamed Communication University of China in August 2004, following its transformation from the Beijing Broadcasting Institute.

The school is situated along the banks of Beijing’s ancient Grand Canal, nestled between the capital’s core functional area and Beijing’s urban sub-center, enjoying convenient transportation and a distinct locational advantage. The campus boasts a beautiful environment and covers an area of… 463,700 square meters, with a total floor area of 638,800 square meters.

Communication University of China to China–Singapore Innovation Independently developed DNTS-6 Time server and digital sub-clocks DNZD Conduct an in-depth evaluation and arrive at the final results. All are superior to the parameter requirements. ， And Regarding our company’s product quality and after-sales service Also quite satisfied. ， Procured successfully and put into use. ！

The network time server developed by Beijing Zhongxinchuang Technology Co., Ltd. DNTS-6 It is an intelligent, high-precision device. NTP network time server. DNTS- 6 Network Time Service Server from Standard time information is obtained from systems such as GPS, BeiDou, GLONASS, Galileo, 4G, and CDMA, and standard time services are provided 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 thereby synchronize with international standard time. When using GNSS satellite receivers, priority settings can be defined, and configurations supporting single‑receiver/dual‑receiver and single‑antenna/dual‑antenna modes are available; each receiver can be configured individually or in combination to operate in timing mode.

DNTS-6 There is 1-2 one 10/100 adaptive Ethernet ports, with physical isolation between ports to ensure data security; they can all be configured on the same subnet or on different subnets, offering redundancy—failure of one port will not affect the normal operation of the others. Each Ethernet port must be assigned a unique IP address.

Performance Metrics

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
	Support NTP Peer Client/Server Broadcast Multicast
Server performance	GNSS reference mode, Tier‑1 network time server, with an internal synchronization accuracy of 20 ns.
	NTP request volume: 2 0000 times per second per network port
	User terminal synchronization timing accuracy: 0.1–2 ms (typical value for a local area network)
	User capacity: Supports tens of thousands of clients.
	Can be used as a client to synchronize with others. NTP network time server
	Support 100,000 log entries feature
	High-performance, wide-temperature server motherboard, based on a deeply customized… Linux operating system, suitable for a variety of demanding work environments.
Receiver	72-channel timing‑grade GNSS receiver, with optional multi‑source time synchronization via GPS, BDS, GLONASS, Galileo, 4G, and CDMA. Users can manually select a single item via command. GPS, BeiDou alone, or GPS + BeiDou dual-satellite system
	UTC synchronization accuracy: 20 ns (RMS)
	Tracking and locking sensitivity can reach -166dBm
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 smooth system transition.
	Encryption method: Supported MD5 security authentication protocol; supports certificate-based encryption protocol The system supports user authentication and access control capabilities.
	Supports heartbeat detection and hot switchover across multiple devices and network interfaces.
	High reliability, MTBF Time 90,000 hours
Management approach	Support Management via SSH, Telnet, Web interfaces, SNMP, and DNTS-Manager network management tools enables easy remote network login, administration, configuration, and maintenance.

After a long… 21 With years of industry experience, our company has established a strong corporate reputation and a robust brand image. Serving the education industry The customer also has:

Peking University, Tsinghua University, Central Party School, Tongji University, National University of Defense Technology, Wuhan University, Harbin Institute of Technology, China People’s Public Security University, Beihang University, China University of Petroleum, National Academy of Administration, Nankai University, China Academy of Traditional Chinese Opera, University of Science and Technology Beijing, Beijing University of Technology, North China Electric Power University, Beijing University of Mining and Technology, North China University of Technology, Communication University of China , Beijing Institute of Technology, Beijing Normal University, Beijing Forestry University, Capital Physical Education College, Dalian Maritime University, Xi’an University of Electronic Science and Technology, Beijing Institute of Petrochemical Technology, Party School of the Beijing Municipal Health Bureau, Beijing Wuzi University, Northeast Forestry University, Changchun University, Changsha University of Science and Technology, Beijing Industrial Vocational College, Panyu International College, 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 Fujian Sangang Group.

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Zhongxin Chuangwei provides a precision clock to Fujian Sangang Group.

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