Recently, Microsoft has confirmed that the Win8 entity package will not be sold in China. The only way for Chinese users to upgrade their computers to Windows 8 is to purchase a download version of the operating system. According to reports, after discussing with numerous customers, Microsoft decided that in order to simplify the distribution model of Windows systems in China, the physical distribution of Windows software packages will be cancelled in the future. This move is likely to attempt to slow down the Windows 8 piracy package "run rampage" in China.
According to the Business Software Alliance, sales of genuine software in China were only $3 billion in 2011, while pirated software sales were three times that.
Ethernet power supply system is referred to as POE power supply, which consists of Ethernet power supply equipment and Ethernet power equipment. It can transmit data and provide DC power supply to client equipment only through one Ethernet cable, without the need for additional wiring.Gigabit POE Switches are divided into managed and non-managed POE switches ,non-standard POE switches which do not meet the IEEE802.3af/at. and also it has indoor series and outdoor series with 10/100/1000M input and output port.
Features:
1. Can recognize the impedance of the signal. When an input voltage is applied to the device, it must be roughly identified within the defined voltage range. When an ethernet power device pleads for power supply, it first sends out the voltage signal of 2.5V~10V to Ethernet. After detecting the voltage signal, the power facility puts a 23750 ohmic resistor on the power supply circuit, and the current changes with the input voltage. By detecting the current, it is confirmed that there is an effective Ethernet power supply at the Ethernet cable terminal. If the arranged resistance value is in the area of 26250 / 45000 ohms, it is considered that the ethernet equipment is effective but does not need to supply power. Resistive values of other sizes mean that the detected ethernet equipment is useful.
2. Type. Electricity is equipped with a type of gap, each type corresponding to not a certain current. Analogy, the "0" class of electricity is equipped with a current of 0.5 Ma 4 Ma. When an effective signal is detected by a power supply, it is classified. The specific method is to lift the voltage to 15.5V or 20.5V on the Internet link, so that the Ethernet power equipment loses a static current, and then completes the classification of the power facilities according to the current scale.
3. Open coherent connection. There are two kinds of switches connected to Ethernet power supply (Poe power supply), one is bipolar crystal switch, which has high utility and low capital, and the other is MOSFET switch, which has extremely high power performance and can be close to 100th.
Application:
Suitable for different Ethernet devices such as: IP phone, network security camera, PDA, mobile phone charger, card reader, etc.
Product images:
POE Switches
Unmanaged POE Switch,POE Switches,Smart POE Switch,Network Switch POE
Dongguan Xiaoerduo Electronics Co., Ltd. , https://www.steadysmps.com