Posted by Drew Merritt on September 5, 2019
Connect the Plantronics APC-41, APc-42 or APC-43 Hook Switch into the back of your Plantronics CS540 (C054) charging base.
Connect the headset extension cord (HA10350) into the headset port of your Cisco desk phone.
*This extension cord is required when you have a Cisco sidecar connecting a Plantronics Hook Switch.
Connect one end of the Plantronics APC Electronic Hook Switch cable into the HA10350 extension cord.
Plug the other end of your Plantronics Hook Switch cable into the Aux port on your Cisco sidecar.
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