4.9 Functions
4.9.1 Combo ports
Characteristics
Combo port is the name for two communication ports. A combo port has the two following jacks:
• a xed RJ-45 port
• an SFP transceiver slot that can be equipped individually
Of these two ports, only one can ever be active. Using the mode, you can decide how the ports
are prioritized.
The port name is the same on both jacks of the combo port, for example "PxC".
There is an LED for each combo port. The LEDs for the combo ports can be identied by a vertical
line and the word "COMBO". The labeling of the combo port LEDs does not dier from that of the
other LEDs, e.g. "P3".
Setting the mode
The following modes can be congured for a combo port:
• Mode 1: auto
The SFP transceiver port has priority. As soon as an SFP transceiver is plugged in, an existing
connection at the xed RJ-45 port is terminated. If no SFC transceiver is plugged in, a
connection can be established via the xed RJ-45 port.
• Mode 2: rj45
The xed RJ-45 port is independent of the SFP transceiver port.
• Mode 3: sfp
The pluggable transceiver port is used independent of the xed RJ-45 port.
The factory setting for the combo ports is mode 1: auto
You congure the mode with Web Based Management or the Command Line Interface.
4.9.2 Power over Ethernet (PoE)
Function
The "Power over Ethernet" function supplies connected devices with power via the Ethernet
cable. Devices supplied with power via an Ethernet cable do not require a separate voltage
source.
Description of the device
4.9 Functions
SCALANCE XM-400
Operating Instructions, 03/2021, C79000-G8976-C306-10 41
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