Plug the other two cords of the Plantronics APC-4 Hook Switch cable into the back of your Cisco phone into the HEADSET port and AUX port. Note: If you go to turn your CS55 headset on and you get a triple beep tone, follow the CS55 pairing guide.
Note: Within your Cisco phone you may need to enable the hook switch mode by the steps below.
- Press settings
- Device configuration
- Media configuration
- Enable hook switch mode