The Plantronics APP-5 Hookswitch Control Cable - For Polycom IP Phones with Plantronics "CS" wireless headsets (Plantronics CS50, CS55 , CS70, CS70N , CS351, CS351N, CS361, CS361N , 510S, & 510SL). Allows your Plantronics SAVI series wireless headset system to communicate electronically (Internally) with your Polycom IP phone so that you don't have to use the HL10 Handset Lifter.
Important Note: To use this cable it requires your phone to have SIP application 3.1.0 Rev C or higher and BootROM 4.1.0 or later installed on it.
What it has to offer:
This cable works with the following Polycom telephone models -
*PLEASE NOTE: If you are using a Plantronics "SAVI" model wireless headset (ie. Models: WO100, WO200, WO300, WO350), you will need to use the Plantronics APP-50 Hook Switch Cable instead. This will ONLY work with the Plantronics "CS" Series.