16 / 05 / 2018
Extralink Kronos - The ideal PoE switch for IP monitoring
Extralink has released a new product on the market – 8-port, unmanaged, gigabit PoE switch with 2 uplink ports (1xRJ45 1000M and 1xSFP 1000M) named Extralink Kronos - The ideal PoE switch for IP monitoring.
Nowadays, there are more and more devices in LAN network. Significant amount of such devices can generate many technical problems connected with the necessity of structured wiring expansion or creation of new power points. Repeatedly this is quite problematic and that is why there are some standards which help to solve this problem.
Power over Ethernet (802.3 af/at) it is a power supply system for devices with the aid of the most commonly used network cable – Cat 5e twisted pair or higher. PoE supply can be used for 10, 100, and 1000 Mbps, yet providing power to devices has no effect on the data transmission.
Thanks to this solution, by using a single network cable you can transmit both data and electricity. In short, PoE enables to simplify the process of entire installation and also the need of hooking up devices to 230V. Whereas such a change has its impact on increasing power consumption by power supply device.
It should also be noted that the PoE standard was defined in 2003 providing 15,4W power for each connection. In fact, the device gets 12,95W while the rest is earmarked for losses due to the transmission of electricity.
At this moment, there are three applied standards to transmit power by the network cable:
- PoE (802.3af)
- PoE+ (802.3at)
The oldest PoE is able to deliver 15,4W, PoE+ to 30W while UPoE (Universal PoE) up to 60W.
The following graphic depicts the development of PoE standard: