Yealink SIP-T2xP Auto Provisioning Manual page 205

Parameter
phone_setting.talk_and_dial_power_led_enable =
(not applicable to CP860 IP phones)
Permitted Values
flash)
1-Enabled ( power indicator LED fast flashes
(500ms) red)
The default value is 0.
If it is set to 0, the status of the power
indicator LED is determined by the value of
the parameter
"phone_setting.common_power_led_enabl
e".
It enables or disables the power indicator
LED to be turned on when the phone is busy.
For SIP-T2xP/T19P IP phones:
0-Disabled (power indicator LED is off)
1-Enabled ( power indicator LED is solid
green)
0 or 1
The default value is 1.
For SIP-T4X IP phones:
0-Disabled (power indicator LED is off)
1-Enabled (power indicator LED is solid red)
The default value is 0.
If it is set to 0, the status of the power
Descriptions
Features->Power LED->Talk/Dial Power
Light On
Appendix
Web Setting Path
195