This is the VXi VEHS-P1 EHS stand for Polycom IP phones (335, 430,l 450, 550, 560, 650, 670, and all
Polycom VVX models). It gives VXi
wireless headsets remote answering capabilities. Compatible with
VXi wireless headsets. Attaches directly to the
base of the VXI wireless headset base with
clearly labeled jacks and cables.