Spracht Electronic Hook Switch CABLE (EHS) for The ZuM Maestro DECT Headsets for Aastra Phones (EHS-2004) - Phone Cable for IP Phone, Headset - Black

Also works with Jabra DECT Headsets Hands-free calls, answer and hang up your calls remotely For use with ZuM Maestro DECT Headsets (HS-2018 and HS-2019) Eliminates the need for a Handset Lifter for remote desktop phone call control directly from the Headset