Posted by Drew Merritt on September 5, 2019
Connect your Plantronics APC-41, APC-42 or APC-43 to the back of your Plantronics CS540 (C054) charging base.
On the other end of the Plantronics Hook Switch cable, plug the smoke colored cord into the HEADSET port of your Cisco phone, then plug the other end into the AUX port.
If your Cisco phone has a sidecar, follow the CS540 setup guide with Cisco using a sidecar.
Sometimes within the Cisco desk phone, the Hook Switch cable needs to be enabled by the steps below.
NOTE: If your phone doesn’t allow you to enable the Hook Switch mode, your phone system admin will need to enable this setting in the Cisco Call Manager.
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