Time-Frequency Encyclopedia

Focus on time and frequency, precise and stable.

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2020

Zhongxin Chuang has provided a precision clock to the Civil Aviation Administration of China, Northwest Regional Administration.

Recently, the Northwest Regional Administration of Civil Aviation of China issued a request for time servers. Beijing Zhongxin Chuang Co., Ltd. proactively collaborated to develop a detailed proposal and recommended its self‑developed and manufactured DNTS‑88‑OGB clock server as the bid‑winning product. Following a highly competitive bidding process, Zhongxin Chuang stood out thanks to its high‑quality products and comprehensive after‑sales service, ultimately securing the contract for the clock synchronization project from the Northwest Regional Administration of Civil Aviation of China.

Supervise and manage the use of funds for construction projects funded by national special allocations within the jurisdiction, as well as oversee basic construction activities. Technology Upgrade Project Financial management; responsible for civil aviation within the jurisdiction. Administrative and public institutions Review and compilation of financial budgeting and final accounts management, as well as other financial statements.

Civil Aviation Administration of China, Northwest Region Developed independently by Zhongxin Chuang DNTS-88-OGB Clock The servers underwent thorough testing, and the results consistently exceeded the specified performance requirements. Furthermore, our company expressed great satisfaction with both the product quality and the after-sales service, leading to a smooth procurement and successful deployment.

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 acquires 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 defined; by default, BeiDou takes precedence, with GPS serving as a backup. If neither receiver receives a 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 disseminates standard clock information via TCP/IP networks and supports multiple popular time‑broadcasting protocols, including NTP and time/UDP, as well as Zhongxinchuang’s proprietary time‑broadcast data 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-8 supports the broadcast mode of the SNTP protocol.

Network Protocol:	NTP v1.v2.v3&v4(RFC1119&1305) SNTP(RFC2030) MD5 Authentication (RFC1321) Telnet (RFC854) UDP NTP Unicast, Broadcast, Multicast, Autokey TIME (RFC868) FTP (RFC959) DAYTIME (RFC867) DHCP (RFC2131)
	HTTP , SNMP v1, v2, MIB II (RFC1213), 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 50 log entries.
GPS/BD Receiver:	50 Channel‑timing‑based GPS/BD receiver; options include single‑GPS, single‑BD, GPS/BD dual‑mode, and CDMA.
	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 screen
	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,
Timekeeping 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 18 years of industry experience, our company has established a strong corporate reputation and brand image, serving clients in the transportation sector, including:

The Ministry of Railways of the People’s Republic of China, China Railway Signal & Communication Group, Civil Aviation Administration of China, Shandong Provincial Department of Transportation, Beijing Railway Bureau, Shanghai Railway Bureau, Guangzhou Railway Bureau, Zhengzhou Railway Bureau, Kunming Railway Bureau, Xinjiang Railway Bureau, Jinan Railway Bureau, Beijing Capital International Airport, Shandong Air Traffic Management Bureau, Dalian Air Traffic Management Bureau, Kunming Air Traffic Management Bureau, Xinjiang Air Traffic Management Bureau, Wenzhou Air Traffic Management Bureau, Chongqing Air Traffic Management Bureau, Chengdu Air Traffic Management Bureau, Zhoushan Port and Shipping Administration, Information Center of Sichuan Provincial Department of Transportation, Beijing All-Rail Communications and Signaling Research & Design Institute Co., Ltd., China Shipbuilding Industry Corporation, Hebei Expressway, Langfang Expressway Toll Station, Wuhan Expressway ETC, Yinzhou Highway Management Section, Meishan Section of Yingguanghong Expressway, Xinjiang Project to Eliminate Provincial Border Toll Stations on Expressways, National Expressway De–Shang Line, Anlin Expressway Project to Remove Provincial Border Toll Stations, Shuohuang Railway Development 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,” working in sincere collaboration with partners across all sectors to jointly achieve win-win outcomes and shared progress for both the enterprise and society.

Zhongxin Chuangwei provides a precision clock to Shandong Desheng Iron & Steel Co., Ltd.

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Zhongxin Chuangwei provides a precision clock to Shandong Desheng Iron & Steel Co., Ltd.

Zhongxin Chuangwei provides a precision clock to the Fifth People’s Hospital of Jinan City.