There have been rumors previously that mobile operator T-Mobie may launch an LTE version of the Samsung GALAXY S3 handset in 2013. According to the information revealed by the Bluetooth technology alliance, a mobile phone codenamed SGH-T999L may be the legendary LTE version Samsung GALAXY S3. Although there is no more detailed information on this phone, the "L" at the end of the code has triggered people's infinite imagination. According to speculation, the LTE version of the Samsung GALAXY S3 may have some enhancements over the generic version. For example, it will support Bluetooth 4.0 technology, but this handset should not be launched early next year.
T-Mobie is selling the Samsung GALAXY S3 model SGH-T999, then the "L" at the end of this new phone code is likely to represent the meaning of LTE. T-Mobie is expected to launch its LTE network in 2013, so it is reasonable to launch LTE-enabled terminal equipment.
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