Unsmooth video and long delay are very common problems in the CCTV IP project. CCTV IP networks are different from traditional data communication networks. It requires high performance in terms of “delay” and “Packet loss”.
Dahua Technology is a world-leading advanced video surveillance solution provider with an in-depth knowledge in video surveillance system. Dahua PoE switches are specially designed to suit video stream characteristics and solve the problems aforementioned.
Recently, Dahua has released 2 new 16/24-port PoE Switches: PFS4218-16ET-190/240 (190W and 240W optional) and PFS4226-24ET-240/360 (240W and 360W optional). These 2 PoE switches are specially designed based on the rich experience in video surveillance system, which are ideal for video transmission. The main features include:
• PoE Setting allows user to reserve some power manually through the web management interface, which can reserve power for those IP cameras which need extra power at some time, such as IP camera with IR feature which requires more power during the night. Moreover, it also shows the real-time power consumption.
• Green PoE feature allow users to set a schedule for PoE consumption, which allows the PoE switch to provide power in certain periods. For example, the user can set for the PoE switch will provide power from 9:00 am to 21:00 pm and will cut the power supply outside this time period, thus saving energy.
Long Distance PoE Transmission up to 250 meters
Regular PoE transmission distance is up to 100 meters. But PFS4218-16ET-190/240 and PFS4226-24ET-240/360 can realize 250 meters PoE transmission through simple configuration in the web management interface. It will save much cost in SFP module and also optical fiber (including the cost in installation).
Power Usage Indicator
The power usage indicator in the front panel can show the current PoE consumption of the PoE switch, which can help you determine whether you can connect more IP cameras: - 50%: means the total PoE consumption is below 50% - 80%: means the total PoE consumption is between 50%-80% - 100%: means the total PoE consumption is between 80%-100%
Both the PFS4218-16ET-190/240 and PFS4226-24ET-240/360 have 2 Hi-PoE ports, which can provide up to 60W for Hi-PoE Dome Network Camera.
Besides these unique features, all Dahua PoE switches have a clear advantage in the following aspects:
1. High reliable components
Power, switching chip and PSE chip are key components of PoE switch. Dahua PoE switches use components from world-leading chip and power manufacturers which ensure the quality and reliability of the switches.
Non-blocking video transmission
Video stream characteristic is di¬fferent from the ordinary data stream. Sudden increase of video stream brings high pressure to the data forwarding of a PoE switch. The flow control function of Dahua PoE switch is enabled by default and large hardware buffer can best ease the sudden data peak and smoothen the video stream.
Dahua PoE switches are designed to work under extreme environments, such as wide temperature range and lightning environment. Dahua PoE switches can reach lightning protection common mode 4KV and differential mode 2KV. Accelerated Life Testing (ALT) is performed to ensure the high reliability and long-life.
Video pressure test
It is important that a switch can handle big amount of video streams in video surveillance. Rich experience in video surveillance has enabled Dahua to design and manufacture the best switches for video surveillance. At the same time, Dahua PoE switches have passed the high video pressure test in a minimal 200 IP cameras environment which demonstrates high product reliability.
Visit http://www.dahuasecurity.com to learn more.