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1What: /sys/class/leds/<tty_led>/ttyname2Date: Dec 20203KernelVersion: 5.104Contact: linux-leds@vger.kernel.org5Description:6 Specifies the tty device name of the triggering tty7 8What: /sys/class/leds/<tty_led>/rx9Date: February 202410KernelVersion: 6.811Description:12 Signal reception (rx) of data on the named tty device.13 If set to 0, the LED will not blink on reception.14 If set to 1 (default), the LED will blink on reception.15 16What: /sys/class/leds/<tty_led>/tx17Date: February 202418KernelVersion: 6.819Description:20 Signal transmission (tx) of data on the named tty device.21 If set to 0, the LED will not blink on transmission.22 If set to 1 (default), the LED will blink on transmission.23 24What: /sys/class/leds/<tty_led>/cts25Date: February 202426KernelVersion: 6.827Description:28 CTS = Clear To Send29 DCE is ready to accept data from the DTE.30 If the line state is detected, the LED is switched on.31 If set to 0 (default), the LED will not evaluate CTS.32 If set to 1, the LED will evaluate CTS.33 34What: /sys/class/leds/<tty_led>/dsr35Date: February 202436KernelVersion: 6.837Description:38 DSR = Data Set Ready39 DCE is ready to receive and send data.40 If the line state is detected, the LED is switched on.41 If set to 0 (default), the LED will not evaluate DSR.42 If set to 1, the LED will evaluate DSR.43 44What: /sys/class/leds/<tty_led>/dcd45Date: February 202446KernelVersion: 6.847Description:48 DCD = Data Carrier Detect49 DTE is receiving a carrier from the DCE.50 If the line state is detected, the LED is switched on.51 If set to 0 (default), the LED will not evaluate CAR (DCD).52 If set to 1, the LED will evaluate CAR (DCD).53 54What: /sys/class/leds/<tty_led>/rng55Date: February 202456KernelVersion: 6.857Description:58 RNG = Ring Indicator59 DCE has detected an incoming ring signal on the telephone60 line. If the line state is detected, the LED is switched on.61 If set to 0 (default), the LED will not evaluate RNG.62 If set to 1, the LED will evaluate RNG.63