sLAN_all-PoE White_Paper_Eng_DM v1.0.1

sLAN/all-PoE White Paper
2
Computers become more efficient tools not only by their own functions but also by utilizing functions provided by
various types of equipment that connects to the outside.
In order for computers to connect equipment to the outside, they usually follow the standard communication methods,
and the most widely used method is serial communication.
Serial communication is a method of communication based on telex communication that came out long before
computers appeared, and almost every computer has serial communication port. Serial communication is easy, while
slow and has difficulty for long-distance communication.
The method currently used for communication between computers is the Ethernet method.
This method allows the parties to be connected to one coaxial cable as N:N, enables simultaneous communication
at high speed. Although Ethernet methods have a convenient wiring structure, they are not suitable for connecting
individual equipment as they are more complex and expensive than serial communication methods.
While these two methods with different purposes and feactures, Ethernet has evolved into an IP network(Internet).
The IP network allows local networks to be interconnected, enables overcoming the spatial limits of Ethernet, which
was several kilometers. Now an environment has been made to communicate with computers anywhere in the world
just by connecting to the network.
Computers and equipment can be connected over the network with only an IP address without physical direct
connection. Therefore, many equipment with serial ports needed to be connected to Ethernet, resulting in converter
connecting them to Ethernet without any changes to the existing equipment.