Our basic network business, that is, to the enterprise provide the necessary internal communications infrastructure. Contains the communication line (light) cable, communications equipment, facilities and security communication function normal operation.
Morse invented the telegraph, is the earliest wired communications. Limited communication system based on cable has strong anti-interference, good secrecy, high bandwidth, high performance/price ratio, and fixed the end-to-end communication characteristics. Cable communication system the most commonly used currently have cable and copper cable transmission medium, the bottom of the communication protocol for various rate of Ethernet, all kinds of serial port communication protocol, and dedicated wide area network communication protocol. Wired communications can provide theoretically unlimited bandwidth and minimum delay performance (the speed of light).
Integrated wiring system is provided in a jurisdiction, within buildings and buildings communication cables between infrastructure, reduce the duplication of investment of communications cables, standardize and connectivity. Integrated wiring system mainly consists of backbone system, level system, form a complete set of pipe bridge system, etc.
In a jurisdiction, generally have a set of unified integrated wiring system, lead to waste of resources and avoid cross management confusion.
Big to large room, small to a separate cabinet, are visible as a data center. And communication within the data center system, and for the purpose of transmission of the common communication system is different. For the delay, bandwidth and reliability requirements are different. Usually data center communication system, including cables, entity virtualization network equipment and network equipment (software).
In some application scenarios, there are some special communication requirements,
cannot be achieved using the existing comprehensive wiring system or the integrated
wiring system is not economic. Need to adopt permanent custom communications cable
system to meet the requirements.
Such as: point-to-point HDMI, VGA cable, RS
- 485 communication cable, terminal actuator driven power and communication cables,
etc.
The radio as a means of communication, the first began with guglielmo Marconi. Wireless
communication based on free space (air or vacuum) to spread. With high mobility,
wide spread, suitable for long distance transmission (not subject to geographical
distance).
Now most of the underlying transport wireless digital communication
which is based on frequency modulated carrier coding compression.
Because wireless
communication based on open space, so the anti-interference ability and weak confidentiality
than cable system. Usually adopt additional anti-interference design, encryption
technology can improve performance.
Wireless network in the field of enterprise
IT usually refers to 802.11 under the standards of wireless local area network (LAN).
At present commonly used molding products comply with 802.11 a/b/g/n/ac standards.
The latest standard (2016) 802.11 AD, working in 60 GHZ frequency band, can provide
thousands of megabit speeds of transmission. This device USES the international
standard spectrum, no additional application for radio frequency resources.
In the field of telecom operators, the wireless network is mainly refers to cellular
communication wireless network (2 g / 3 g / 4 g / 5 g), and 802.11 standard wireless
services in the public area. Use of such communications services, need to buy terminal
operators access criteria, and to pay for use. No additional user application radio
frequency resources.
In addition, there are many other forms of wireless network
mode, such as base station, mobile station and so on. Need to use to purchase communications
equipment, and used in accordance with the area to the local radio regulatory commission
to apply for radio frequency resources.
Through cellular coverage according to need to deploy a large number of indoor wireless
AP, achieve greater throughput of wireless communications.
On this basis, based
on the installation position of AP, provide positioning service for the client.
By deploying wireless AP outdoor, outdoor antenna system wireless signal coverage area. Usually outdoor area of service is focused on the maximum bandwidth and maximum concurrency, improve the service area and quality of AP.
Protect communications cable route, and prolong the service life of facilities. The trunk sections are usually builders, construction access construction period is by cable deployment suppliers.
Carrying cable center client and equipment facilities. According to the different environmental needs, can be divided into outdoor system, indoor closed system, a half open system and open system.
Communications equipment power supply safety involves the reliability of the whole system. Ac uninterruptible power supply to provide the short time delay function (2 hours), is used to supply the report online and fault diagnosis. Dc uninterruptible power supply is available with long time delay (2-24 hours or more) function, so as to not interrupt service in front of the power supply recovery. System monitoring, starting from the supply.
In various harsh environment, provide additional environmental protection for communication
equipment, to achieve its normal work, and extend its service life.
Usually,
high temperature (over 35 degrees), moisture, dust, low temperature (below 15 degrees),
lightning and instantaneous high voltage power supply system, all will affect the
equipment safety and its service life.
Especially the outdoor environment,
environmental protection system is a must.
Transfer instruction in the public network infrastructure and private information, the security matters we focus on the following aspects:
Ensure to establish a reliable communication channel, the information will not be lost, and in communication is not available for the first time (which can be defined response time).
Information of the sender can be traced, confirms that the sender (receiver) electronic identity.
Ensure that only the sender and receiver information content, when it is necessary for electronic signature.
Behavior in line with the authorization of communication design, records or block unauthorized behavior
Transmission in the communication content conform to the laws and regulations and in line with the default specification. Records or blocks malicious code.
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