The Plantronics APV-6B Electronic Hookswitch (EHS) cable for Avaya Phones - For use with the "CS" Series Wireless headsets from Plantronics (CS50, CS55, CS70N, CS351N, CS361N). Communicates directly with the phone from your wireless headset base unit, eliminating the need for the HL10 remote handset lifter.
This cable works with the following Avaya model phones:
2420, 4610, 4610SW, 4620, 4620SW, 4621SW, 4622SW, 4625SW, 4630SW, 5420, 5610, 5620
*If your Avaya model is not listed above, please check out the APV-6A cable instead.