#aggregation switch

Six Indispensable Tips for Choosing a Switch in a Project

How to choose a switch? How do determine the network structure according to the project? We have such questions in most of the projects we do. Here are the six indispensable tips when you choose a switch in a project. 1. Network scale and network layer You can choose the switch according to the network scale and network layer that which the switch is working. The network scales generally are…

Which Wires of 100Mbps and 1000Mbps Network Cables are Used to Power in the POE System?

There are 4 pairs of wires in the standard Cat.5 network cable, while only two pairs of them are used in 10/100Mbps. The following are the two methods allowed in IEEE 802.3af. 1. When the free pin is used to supply power, pin 4 and 5 are connected to the positive terminal, and pin 7 and 8 are connected to the negative terminal. The following diagram shows a 48V power transfer using the free…