Description of the device 
  3.5 Combo ports 
SCALANCE XR-300WG 
Operating Instructions, 05/2017, C79000-G8976-C454-01 
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Combo ports 
Characteristics 
Combo port is the name for two communication ports. A combo port has the two following 
jacks: 
●  a fixed 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 plug-in slot. The LEDs for the RJ-45 ports are located directly at 
the ports. THE LEDs for the pluggable transceiver slots are located to the right and labeled 
with the port name "PxC" 
The following modes can be configured for a combo port: 
●  Mode 1: 
 
The SFP transceiver port has priority. As soon as an SFP transceiver is plugged in, an 
existing connection at the fixed RJ-45 port is terminated. If no SFC transceiver is plugged 
in, a connection can be established via the fixed RJ-45 port. 
●  Mode 2: 
 
The fixed RJ-45 port is independent of the SFP transceiver port. 
●  Mode 3: 
 
The pluggable transceiver port is used independent of the fixed RJ-45 port. 
The factory setting for the combo ports is mode 1: auto 
You configure the mode with Web Based Management or the Command Line Interface.