Time-Frequency Encyclopedia

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2019

Congratulations to Zhongxin Chuang on winning the bid for the DNTS-8 time synchronization equipment for North China Petroleum Communications.

Congratulations to Zhongxin Chuang on winning the bid for the DNTS-8 time synchronization equipment for North China Petroleum Communications.

Recently, North China Petroleum Communications Co., Ltd. issued a procurement announcement for time servers. Beijing Zhongxin Chuang Company proactively collaborated to develop a detailed proposal for the client and recommended its independently developed and manufactured DNTS‑84 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 server project from North China Petroleum Communications Co., Ltd.

North China Petroleum Communications Co., Ltd. is located in Renqiu City, Hebei Province. It is a nationally recognized model unit, a high-tech enterprise, and a key contractor for major national projects. Affiliated with the North China Oilfield Company of China National Petroleum Corporation, the company is a comprehensive information services provider integrating engineering and technical services, information‑technology‑driven operations and maintenance, internet applications, and telecommunications‑and‑broadcasting services. Established in 1976, the company has total assets of RMB 400 million and annual revenues of RMB 500 million.

North China Petroleum Communications Co., Ltd. conducted an in-depth evaluation of the DNTS‑84 time server independently developed by Zhongxin Chuang. The results consistently exceeded the specified performance parameters, and the company expressed high satisfaction with both our product quality and after-sales service, leading to a successful procurement and deployment.

The DNTS-84-OGB 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 time. The DNTS-84-OGB 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 configured; by default, BeiDou takes precedence, with GPS serving as a backup. If neither receiver receives a signal, the DNTS-84-OGB relies on its built-in temperature‑compensated crystal oscillator for timekeeping, achieving a timing accuracy of up to 1E‑9. The DNTS-84-OGB disseminates standard clock information over TCP/IP networks and supports multiple popular time‑distribution protocols, including NTP and time/UDP, as well as Zhongxinchuang’s proprietary time‑broadcast 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-84-OGB supports the broadcast mode of the SNTP protocol.

Network Protocol:	NTP v1, v2, v3, and v4 (RFC 1119 and RFC 1305), SNTP (RFC 2030), MD5 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, SNMP v1 and v2, MIB II (RFC 1213), RSA asymmetric encryption
	IPV4
NTP Server Performance:	GPS/BD clock reference mode, Tier‑1 network time server, internal synchronization accuracy of 1 µs.
	User terminal synchronization timing accuracy: 0.5–2 ms (typical value on a local area network)
	User capacity: Supports tens of thousands of clients.
	NTP request rate: 2,000 requests per second (per network port)
	It can serve as a subordinate server to synchronize with other NTP network time servers.
	Supports the latest 50 log entries feature.
GPS/BD receiver:	50-channel timing‑grade GPS/BeiDou receiver, available in single‑GPS, single‑BeiDou, and dual‑mode GPS/BeiDou configurations, with CDMA option.
	UTC synchronization accuracy: 30 ns (RMS)
	Receives L1 C/A code signal at 1575.42 MHz
	Tracking and lock‑on sensitivity can reach −160 dBm.
Device Timing Function:	Temperature‑compensated crystal oscillator (optional, depending on model): Timing accuracy: better than 1E‑10.
Device Timing Function:	Rubidium atomic clock (optional, depending on model): Timing accuracy: better than 1E-12.
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, and system operating status.
	5 indicator lights: PWR, LOCK, HOLD, ALARM, TIME
	Indicates whether the NTP service is running and whether the network connection is normal,
Time-keeping management software performance
Client-side time synchronization software:	Provides NTP‑based time‑synchronization software for Windows, running as a service and offering a monitoring, control, and configuration interface. Client support includes operating systems such as Windows 98, NT, 2000, XP, Vista, 7, Unix, Linux, AIX, and others.
DNTS-Manager Network Time Synchronization System Monitoring Software:	Provides timing‑monitoring software for NTP servers and clients, enabling the monitoring of synchronization status and time offset on both NTP servers and timing clients, with alert and log generation. Alerts can be delivered via protocols such as Syslog and email. The system supports simultaneous monitoring of at least 1,000 NTP servers and at least 10,000 client devices. Monitoring includes NTP server information—such as uptime, synchronization status, and network parameters—as well as NTP server time‑synchronization status, including satellite time, server time, and synchronization with reference sources. Features also encompass server and client lists, comparison thresholds, and configurable settings for email and Syslog notifications, along with delivery‑status management.

With 17 years of industry experience, our company has established a strong corporate reputation and brand image, serving… Petrochemical and Steel

Our clients also include:

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 Minguang Co., Ltd., Angang Steel Co., Ltd., Chongqing Iron & Steel (Group) Co., Ltd., Tianjin Jinwanhang Petroleum Materials & Equipment Co., Ltd., and others.

The choice of numerous departments and enterprises reflects recognition of Zhongxin Chuang’s products and services. Our company will continue to uphold our corporate mission of “Innovative Technology, Serving a Better Life” and pursue the corporate goal of “Becoming a Creator of Exceptional Quality,” working in sincere collaboration with partners from all sectors to jointly achieve win‑win outcomes and shared progress for both our enterprise and society.

Congratulations to Shaanxi Yulin Energy Group Co., Ltd. on the procurement of Zhongxin Chuang’s DNTS-7 series time synchronization equipment.

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Congratulations to Shaanxi Yulin Energy Group Co., Ltd. on the procurement of Zhongxin Chuang’s DNTS-7 series time synchronization equipment.

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