Siemens SCALANCE X101-1 Operating Instructions Manual page 23

Note
In standalone mode, the link status of the port LEDs is only displayed if the same link status
is detected at both ports P1 and P2.
In transparent link mode, the link status at the optical port (P2) is detected and displayed
even without a link at the electrical port P1.
Transparent link LED "TL" (green LED)
The transparent link LED indicates the mode of the device.
LED color LED status
Green Lit
- Off
SCALANCE X-100 media converter
Operating Instructions, 04/2016, C79000-G8976-C346-02
Meaning
Transparent link parameters set.
Stand-alone mode. End devices are connected to both ports of the media converter
(no cascading).
Description of the device
3.5 LEDs
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