WAGO 852-1305 Manual page 48

48 Enhanced Features WAGO-ETHERNET-Zubehör 852
852-1305 8/4-Port 100BASE-T/1000BASE-SX/LX
Auto MDI/MDIX
MDI ("Medium-Dependent Interface") is part of the transmitter/receiver unit
(transceiver) of a network device.
Auto-MDIX ("Automatic Medium-Dependent Interface Crossover") is a network
technology integrated in the port that automatically detects the required network
cable type ("Straight-Through" or "Crossover" cable) and configures the
connection accordingly.
"Crossover" cables are then unnecessary for connecting devices.
The interface corrects incorrect cabling automatically.
For Auto-MDIX to work properly, the speed of the interface and in the duplex
settings must be set to "Auto".
Auto-Negotiation
Auto-negotiation is a method in which two interconnected ETHERNET network
ports (e.g., the network port of a PC and a port of a router, hub or switch that is
connected to it) that independently negotiate and configure the maximum
transmission speed and the duplex process.
Auto-negotiation only applies to twisted-pair cables, but not to WLAN, fiber optic
or coaxial cable connections.
If the port does not support auto-negotiation or the function is disabled, the switch
determines the connection speed by detecting the signal on the cable and using
half-duplex mode.
If auto-negotiation is enabled on the switch, a port uses its pre-configured settings
for speed and duplex mode when establishing the connection.
This should ensure that the same settings have been made on the port, allowing
the connection to be established.
Flow Control
"Flow Control" regulates the transmission of signals by adjusting them to the
bandwidth on the input port.
Higher data traffic on the port decreases the bandwidth and can overflow the
buffer memory, which can lead to packet and frame loss.
According to IEEE802.3x, the switch uses "Flow Control" in full-duplex mode
and "Backpressure Flow Control" in half-duplex mode.
Manual
1.1.0