Plug one end of your Plantronics APP-5 Hook Switch cable into the bottom back of your CS55 charging base.
Step 2
Plug the other end of your Plantronics APP-5 Hook Switch cable into the back of your Polycom desk phone into the HEADSET port and 5 pin connection port.
Step 3
Enable the Hook Switch control in your Polycom desk phone by the steps below.
Press menu
Settings
Basic
Preferences
Headset
Headset memory > Enable
Hook switch mode > Set to Plantronics EHS
Your phone will reboot and your headset is setup to answer/end calls away from the phone