Syrotech SY-0400P-2T-60W is 4-port intelligent PoE switch with 4 working modes, VLAN mode, Extend mode, PoE mode, and QoS mode. By default, all ports are free to communicate; when VLAN mode is enabled, 1-4 ports are isolated from each other, which can effectively suppress network storms and improve network performance. In the Extend mode 1-4 ports can effectively transmit distances up to 250 meters, which is suitable for remote monitoring and power supply. In the PoE mode, the switch automatically detects the working status of the PD device and finds that the abnormal device automatically restarts the device. In the QoS mode, when the device is congested, the video data is processed preferentially to make the video smooth. The device supports the standard IEEE 802 af/at protocol, which can automatically detect and identify the PDs that comply with the IEEE 802 af/at standard and provide power for them, so there is no need to worry about PoE or non-PoE devices that can damage private standards.