What does a green headset light on the Polycom phone mean?

Green Headset light blinking on Polycom = headset memory mode is on.

Headset won’t hang up headset button on phone properly and/or you can’t pick up handset on the phone and get audio? Turn OFF Headset memory mode

How to turn off Headset Memory Mode:

1) Click on the menu or home button on the Polycom phone

2) Settings

3) Basic

4) Preferances

5) Headset

6) Memory mode - disable or turn off