Plantronics APA-2 Headset Electronic Hookswitch Control (HHC) for Alcatel Phones.  It's compatible with Plantronics wireless headsets (Plantronics CS50, Plantronics CS55 , Plantronics CS70, Plantronics CS70N , Plantronics CS351, CS351N, CS361, CS361N , 510S, 510SL) transforms your Alcatel phone through remote answer/end and ring alert. It is compatible with the following phones:

note: Do not order this adapter if your phone is not listed