NTP clock server still has this function

NTP clock server still has this function
when the Compass School Server Introduction
Beidou server is in response to our customers on time unified system requirements, from the perspective of ensuring security reasons, the use of current advanced circuit integration, software programming technology, combined with China's Beidou satellite technical characteristics of input-Compass satellite signal, the output (TTL, IRIG-B, differential, serial port, network, etc.), multiple devices applicable (network camera, the NVR, server, storage, computer, control, etc.) as a rail weather electricity, finance, shipping channel and related fields to provide a high-precision, high stability, high security, high reliability standard clock source. Embedded devices internationally accepted NTP / SNTP protocol, all the computers in the network server synchronization, controllers and other equipment, the realization of the school network is to provide accurate network equipment, the best choice for standard, safe, reliable clock synchronization service.
A server having Beidou correction receive satellite state switching function, can distinguish the state of GPS, Beidou receiving satellite may be provided GPS, Compass to any one of the reference source as a reference source when the primary reference source is unstable or is not available, it is possible to automatically cycle through to the next on a system level backup; if the two systems are not available or interference due to external causes can not receive satellite, the device can be automatically switched to keep the cell pattern, continues to provide a highly reliable reference time and frequency information output.
The core technical parameters as
1) support windows, LINUX, UNIX, SUN SOLARIS , IBM AIX operating system such as time synchronization;
2) Support NTP v1.v2.v3 & v4 (RFC1119 & 1305 ), SNTP (RFC2030) protocols such as;
3) to the DHCP function, All LAN port network device, to automatically obtain an IP address;
excellent 4) safety performance, provide firewall protection, enable SYN-flood defense, greatly improve the security of the internal network, to reduce the risk;
5) support the heartbeat detection , multiple time servers or multiple network ports can be set to the same IP, mutually redundant backup;
6) support wEB, SSH encrypted communication parameter management software monitors and settings;
7) the WEB support firmware upgrades, and to provide backup import parameters, and remote logging system local log transmission function;
8) design software and hardware watchdog, QoS function (traffic monitoring) and network diagnostics;
9) parameters files can be exported and imported;
10) network configuration page in English switch, set the user name and password and host name;
11) load, running time, real-time traffic and memory status and other real-time monitoring;
12) displays real-time links, including client access time IP server communication protocols and the amount of interaction data, and display historical data in graphic form.
Chassis size
1U, 19 "standard chassis (upper chassis) 482mm (width) X300 (depth) x44mm (high)
physical map server Beidou correction as follows:
SYN2136 Compass type NTP network time server
services ten characteristics Beidou correction:
1 , modular structure, NTP / SNTP number of ports can be flexibly configured, up path 70 much physically isolated network port available to the user
2, antenna Compass Alternatively, the mushroom head sucker antenna and the antenna, the antenna can be put to a mushroom head outdoor, 30 m, 50 m, 80 m, 100 m, 150 m, 200 m length to choose, sucker antenna primarily on to the window, more convenient installation, additional timing antenna 2 large types, 1, GPS time service antenna, 2, GPS timing antenna Compass dual-mode, dual-mode device if it is, then Beidou timing Beidou dual mode GPS antenna can be set up when the antenna is granted, without erecting two antennas, save a lot of manpower, material and financial resources for the entire project.
3 , large capacity, while the server can be tens of thousands of terminals to provide accurate time correction Compass.
4, a variety of configuration, software configuration, and computer configuration has to choose.
5, special equipment Embedded systems, no hard disk and fan design, stable and reliable.
6, a liquid crystal display device and its rich content, such as: your star status, year, month, day, hour, and so time is valid, your star status is a guarantee time accurate information. Equipment Division output 1 second pulse signals, to facilitate the accuracy of third-party test equipment.
7, the server chassis Beidou correction imported aluminum chromating, pull filaments matte silver, aluminum after passivation treatment, aluminum chromated layer is formed so that the surface passivation film can achieve a dense anticorrosive purpose, conventional black and silver cabinet chassis to choose.
8, the use of SMT surface mount technology production, high-speed chip control, no hard disk and fan design high accuracy, good stability, function, no accumulation of errors, without geographical climate and other environmental conditions, cost-effective, easy to operate , automatic intelligent operation, maintenance-free operation, suitable for unattended.
9, quality guarantee period from the date of acceptance of delivery from the device. Product quality guarantee period, due to a fault condition occurs due to the quality of the product itself, take the machine repair, send parts, providing backup products, etc., to provide comprehensive free warranty service.
10, when school Beidou any single or multiple servers can achieve redundancy, to provide a stable source of time.
11, when the correction Beidou server network topology is as follows:
As shown, Beidou time synchronization simultaneously to the computer, network cameras, various servers / storage, video monitoring terminal, and a network time clocks and the like via a network switch simultaneously synchronization in order to achieve unity of time function.
Use as follows:
1. The packing list complete equipment and accessories are intact, if the box is seriously damaged, can contact the manufacturer, until the instrument performance test.
2, the device out of the box, flat on the console or cabinet. The antenna device is inserted into the antenna input terminal, and to ensure that the antenna can receive satellite.
3, connecting the antenna, power within 3-5 minutes can receive satellite, the display screen by the letter V in variant A, the display can receive satellite number of stars. Star collection effective than 2 stars time after receiving from the satellite network device port connected to the switch network cable, when the correction according to the instructions.
friendly reminder:
1, the mushroom head antenna holder mounted on an antenna fixed to the housing and attached to the top or platform, to ensure the greatest possible mushroom antenna field of view (360 ° sky), without obstructions, if equipped with a lightning arrester, the arrester is connected to the machine and the middle antenna.
2, all of the antennas are standard shall not be arbitrarily cut off or superimposed random links, or can not guarantee receipt of the star.
3, all of the antennas star result in the first test after the receipt of the goods, so better than the erection of the cable and then measured the star result save a lot of trouble.
4, when the star will not receive multi-antenna effect for a few places to try to eliminate the problem still receive satellite antenna problem area.
Xi'an Electronic Science and Technology Co., Ltd. synchronous
timing sense Beidou satellite
using the Beidou satellite, when the number of available spread across the globe with VHF; VHF propagation with the number not only deliver high accuracy, but also improve the accuracy of the clock than by common-view method, the use as transfer clock satellite clock and timing accuracy than can directly transfer clock, the clock is difficult to make a direct transfer to the two co-clock view it. Common-view system can eliminate many errors and slow time-varying error, the random errors can change quickly eliminated by smoothing accumulation.