The Ethernet protocol TCP / IP is very much in use in today's mobile communications market. The agility of the Ethernet platform is partly due to its high performance. Due to the fact that it is very It has been developed as a standard. The agri- culture will also create new strengths in the infrastructure available. such as the network, network, network, information and communication. M & A fund management is set in the current Ethernet network.
Networking in Network Technology?
Ethernet transmits data at current speeds of up to 1Gbit / s (1000BaseT) using a 5/6 UTP twisted-pair cable. Power over Ethernet (PoE), a self-powered Ethernet connection, utilizes the built- of the connection by means of both the data to transmit both the data and the data. The energy from one point to the other passes through the UTP. The technology is widely accepted and accepted by the online market.
Power over Ethernet UTP is derived from the functionality of traditional telephone systems (POTS), in the The same phone is powered by a remote total (CO or PBX) over the UTP.
Ethernet connection c. available atilde; It is very much present in the devices in both the network infrastructure and the user. Use UTP to provide both data and information. The source will reduce the cost. installation v & agrave; deploying applications such as remote access point, remote camera security camera, VoIP phone, security device, and so on. access control b & w;
Progress towards unification
IEEE starts qu Learn & standardize since 1999. Participants at the beginning included 3COM, Intel, PowerDsine, Nortel, Mitel v. National Semiconductor. Qu & aacute; Learn & standardize atilde It has gained a lot of success stories at many of the world's leading companies. can i have problems? It is very important to look at many different aspects. IEEE 802.3af standard nowadays agrave and agrave; atilde to be standardized by the IEEE Standardization Office dated 12 th June 2003.
Changes in the final version of the standard It will be possible for some of our current products. The Market for Alternative Investment has been amended to conform to the latest version of the Standard & Poor's Standard.
Application of IEEE 802.3af Power over Ethernet - New generation power
802.3af standard. It looks like a promise but it is not. International standard for a range of terms; New power supply.
Show only a For example, able to If you use only spare batteries. N & Anyone who comes with a mobile phone needs a power supply. a plug and play device composite. To maintain The laptop's operating system, you will need to get the power to plug in. Before you connect, make sure you are using the network to exchange data. With the new standard, you only need to connect to the network and the network. Do not worry if you have a power outlet.
Power supply Ethenet creates a perfect combination
The technology will lead to the emergence of many types of equipment. New apps such as c & ldquo; to & agrave; & agrave; & rdquo; is connected to the network.
Power over Ethernet c. Can overcome some restrictions on position. For example, in locating an access point in a LAN, It is important to install a new power outlet in place. new.
Power over Ethernet - D & amp; available
Currently, PoE Can provide 48VDC power with maximum power. 12.95W over Cat5 for 10/100 / 1000Mbit / s Ethernet service standard. To c able to In accordance with the IEEE 802.3af PoE standard, c Ethernet device must be defined, type, and type. control capability in a startup v & agrave; The difference between the source and destination of the source and destination. data.
Figure 1 shows a typical system. Ethernet switch is maintained. v & agrave; M & E & l & agrave; A source & ldquo; intermediary & rdquo; To & ldquo; m & rdquo; v LAN. At the other end of the line, the source is used to operate the device, the LAN access point, camera, and camera. c. A backup system (UPS) will also help in the event of a power outage.
How is the energy transmitted through the LAN?
Cat5 Standard Ethernet Cat5 4 to twist, but only to twist. Two are used to transmit data according to the 10BaseT standard. 1000 BaseT. This creates two possibilities for using energy.
Use of this site constitutes acceptance of the Terms of Use and Privacy Policy. Figure 2 shows you the number 4 in & agrave; Numbers 5 are connected together to create the source n; i & # thir & # thirteen & # thirteen & # thirteen; The number 8 is connected to each other. create the source & n; (In fact, the last change in the standard requires the source of the source to be polarized or positive.)
Use the & cs; Since Ethernet is transformer coupled at each end, c. power supply between primary and secondary secondary tap (center tap) m & agrave; Influence g & igrave; to the exchange of data. In operation mode, y & rsquo; & # thirteen; This is the number 1 in & agrave; The number 2 will be displayed. c supply of poles.
& nbsp;
Keep in mind that the standard format is only for selecting one of the two modes (not used in both modes). The powered device must be powered. the ability to accept both options.
In the first place, Hub & ldquo; intermediary & rdquo; l & agrave; a Power Sourcing Equipment, a VoIP phone, an access point, line, camera l & agrave; c powered device. A newer Ethernet switch c. can This includes the agrave function; by the way Hub & ldquo; intermediary & rdquo; c. can be needed. Electrical & Mechanical 48V DC v & agrave; The capacity is about 13W. ph & ugrave; Comply with the supplied equipment. A separate DC-to-DC converter to turn the 48V power supply to a lower power supply will need to be turned off. Comply with the electronic circuit in the powered device, while still maintaining the power supply. It is rated at 1500V. the to anthropy According to Amir Lehr, president of PowerDsine, The first major development in agri-technology, the biggest problem, l & agrave; energy loss through the connectors i & c; V & ig; For example, the 802.3af standard specifies a 15.4W rated per port, when it comes to the device being powered on; The cure rate is only 13W. The level of coverage is sufficient for most types of IP phones (from 3W to 5.5W), for Web cameras and video cameras. WLAN access point (6W to 10W). & Nbsp; For the simplest manual need about 20W, the user also needs to have a minimum of 20W. Can increase the battery life of the battery.
C A standard bridge is used to prevent the current network device from being damaged. A & quot; play current & quot; application running from the power supply (PSE) device, will check for ethernet, to ensure that the device is compatible with the standard. N & oacute; Performs a low level of electromagnetic radiation with limited power and control. check if The presence of a 25 k resistor (at the remote terminal) Only when the current resistor is present does the 48V power supply come on, but with a limited power to transmit it. As a result, the device can not be used in the event of an error.
PDs must continue to be maintained; A minimum power rating. If the device (for example, when the device is disconnected from the network), the power supply (PSE) will power the device. The playlist has started playing.
To enhance the current firmware, the device is powered (PD). Indicates that the power supply (PSE) need maximum source.
The power supply is also powered. It provides a level of management. The system uses SNMP protocol. The management of the It works like turning off remote power or resetting.
& Nbsp; both
Disagreement about gender both equipment Utilization of technology is comparable to that of conventional electronic devices. Spaces really l & agrave; The source supply chain is added to the network according to the m & A common circuit-switched device with an auxiliary power supply. Currently, The item is about 50% more expensive. Numbers It will decrease to 20% in the long run.
Peter Doggart, chief marketing officer of the UK's leading telecom company, 3COM, Confirms the c switch. Power supply will be more expensive from 20 to 40% wear. a Actual current switch instance c. power supply USD 2500 while of the usual switch; 1600 USD.
However, For high power system part, Agrarian reform is acceptable, especially when technological advances are introduced in the next years. It is suspected that the new technology is changing the way electronic devices are handled.
Some applications of technology
C & C equipment used in modern technology. c. market value. Not yet Restrictions & Restrictions with hub & ldquo; intermediary & rdquo; PSE. Major applications Use of technology:
VoIP Phone
- IEEE 802.3af IEEE 802.3af Access Point
- Bluetooth access point
- Web camera
V & agrave; for the upcoming app:
- Smart signs / web signs.
- M .
- M & play.
- Audio / video juke boxes.
- Points of interest of the information system.
- Develops an access control system.
- Mobile device for mobile phones; PDA
- electronic musical instruments
(Pham Chuong)
