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What: /sys/class/leds/<led>/ttyname
Date: Dec 2020
KernelVersion: 5.10
Contact: linux-leds@vger.kernel.org
Description:
Specifies the tty device name of the triggering tty
What: /sys/class/leds/<led>/rx
Date: February 2024
KernelVersion: 6.8
Description:
Signal reception (rx) of data on the named tty device.
If set to 0, the LED will not blink on reception.
If set to 1 (default), the LED will blink on reception.
What: /sys/class/leds/<led>/tx
Date: February 2024
KernelVersion: 6.8
Description:
Signal transmission (tx) of data on the named tty device.
If set to 0, the LED will not blink on transmission.
If set to 1 (default), the LED will blink on transmission.
What: /sys/class/leds/<led>/cts
Date: February 2024
KernelVersion: 6.8
Description:
CTS = Clear To Send
DCE is ready to accept data from the DTE.
If the line state is detected, the LED is switched on.
If set to 0 (default), the LED will not evaluate CTS.
If set to 1, the LED will evaluate CTS.
What: /sys/class/leds/<led>/dsr
Date: February 2024
KernelVersion: 6.8
Description:
DSR = Data Set Ready
DCE is ready to receive and send data.
If the line state is detected, the LED is switched on.
If set to 0 (default), the LED will not evaluate DSR.
If set to 1, the LED will evaluate DSR.
What: /sys/class/leds/<led>/dcd
Date: February 2024
KernelVersion: 6.8
Description:
DCD = Data Carrier Detect
DTE is receiving a carrier from the DCE.
If the line state is detected, the LED is switched on.
If set to 0 (default), the LED will not evaluate CAR (DCD).
If set to 1, the LED will evaluate CAR (DCD).
What: /sys/class/leds/<led>/rng
Date: February 2024
KernelVersion: 6.8
Description:
RNG = Ring Indicator
DCE has detected an incoming ring signal on the telephone
line. If the line state is detected, the LED is switched on.
If set to 0 (default), the LED will not evaluate RNG.
If set to 1, the LED will evaluate RNG.
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