YeaLink T21PE2 E2 LED Lights

[petewatterschats]

Upper right 1" LED

T21PE2 LEd Red
T2PE2 LED not Light
T21P LED Green

What are these LED's telling me, I can not find in their manual

 

[leejor]

Is the answer on page 5 of this manual?

http://www.yealink.com/Upload/document/ ... 337036.pdf