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.
If you’re unable to do this on your Cisco desk phone, your phone system admin will need to enable this feature within the Cisco Call Manager.
for other helpful setup guides, follow the Plantronics CS55 wireless headset setup resource center.
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