Frequently Asked Questions
PoE and PoE+, how many watts?
Is a PC plugged into it at risk?
What is the longest cable run?
How to choose a PoE switch?
A PoE (Power over Ethernet) switch provides both the network and electrical power through the RJ45 cable. It saves running a power outlet to each IP camera, Wi-Fi access point or IP phone.
Number of ports
Count the devices to be powered, plus one port to connect the switch to the router, and keep a margin for future additions.
- 4 to 5 ports: the 4-port Hikvision or the TP-Link LiteWave LS105LP, for a small camera kit at home or in a shop.
- 8 to 9 ports: the 8-port Mercusys with 7 PoE+ ports or the TP-Link LS109P, for larger premises or a mix of cameras and access points.
PoE or PoE+
PoE+ provides more power per port than standard PoE. It is useful for motorised cameras, cameras with powerful infrared or recent access points. Also check the switch's total power budget: the sum of the connected devices must not exceed it.
Fast Ethernet or Gigabit
The 10/100 Mbps models (Hikvision, TP-Link LiteWave) are enough for surveillance cameras. The Mercusys, with Gigabit ports, is better suited to Wi-Fi access points and file transfers.
If you do not need power, see the 5-port switches and 8-port switches, or all network switches.