Abbreviation ICD, the full name of Industrial Communication Device. This column will be fully introduced wired communications equipment and wireless communications equipment suitable for industrial environments. Wired communications equipment describes the conversion equipment to solve the industrial field for serial communication, professional bus communications, industrial Ethernet communications and a variety of communication protocols. Wireless communication devices are mainly wireless AP, wireless bridge, wireless LAN, wireless arrester, antennas and other equipment.
Classification of communications equipment
Simplex: only one-way communication, such as a variety of remote control. Half-duplex: walkie-talkie. Full duplex: can two-way communications. Such as home telephone landline (local), mobile phones, computers, modems, radio, satellite phone (Maritime phone) and so on. Broadly: TV, radio, satellite signal transmitters and receivers, a variety of wireless industrial / building control systems, radar, sonar, and so on.
Communications equipment is divided into: 1 core layer device; 2 aggregation layer devices; three access layer devices..
Core layer devices: mainly high-end routing equipment, Huawei, ZTE, Alcatel has, can handle more than 4 layers of the network hierarchy;
Aggregation layer devices: ZTE 89 series, 32 series, you can do three layer processing switching equipment;
Access equipment: including operators of access equipment and access terminal clients;
Communications equipment: telephone mobile telephone radio switch
Communication device spare parts
A station master;
2 base station amplifiers, tower mounted amplifier device (if equipped);
3 base AC and DC power distribution equipment;
4 station batteries;
5 station air-conditioning;
6 power station environmental monitoring equipment;
7 base station transmission equipment;
8 base station Antenna Systems;
9 base lightning protection equipment;
10 station safety facilities and room lighting and sockets
Equipment, etc. ...... these are just the base station
communication equipment accessories
Main pieces of communications equipment: telephone coupler, TV, scheduling PBX, telephone switches, buttons dispatcher, UPS power supply, computer, telephone underground explosion, the DC power supply.
Switch
Switch (in English: Switch, meaning "switch") is a network device for forwarding electrical signals. It can provide a path for electrical signals exclusive of any two network nodes to access the switch. The most common switches are Ethernet switches. There are other common telephone voice switches, fiber optic switches.
Exchange (switching) is in accordance with the needs of communication at both ends of the transmission of information, or the device automatically using artificial methods, the information to be transmitted to collectively meet the requirements of the technical route accordingly. Depending on the position of the switch work can be divided into WAN switches and LAN switches. WAN switches (switch) is a function of the device to complete the exchange of information in the communication system, it is applied at the data link layer. Switch has multiple ports, each port has a bridging function, can be connected to a LAN or a high-performance server or workstation. In fact, the switch is sometimes referred to as multi-port bridge.
Aluminium Communictaion device parts
In a computer network system, proposed the concept of improving the exchange of shared mode. The HUB hub is a shared physical layer devices, HUB itself does not recognize the MAC address and IP address, when host A to B within the same LAN hosts to transmit data packets to the HUB is based on the transmission network is broadcasting by each terminal to determine whether the received header authentication data by the MAC address. In other words, in this work, the same time only one set of data frames transmitted on the network communications, if a collision had occurred retry. This approach is shared network bandwidth. Popular to say, is not an ordinary switch with management functions into a single line, the other interface connected to a computer on it.
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