The Plantronics 26716-01 replacement cable is the bottom coiled cable that plugs between the Plantronics H-series headset and Plantronics M12, M22, M10 or MX10 amplifiers.
It is also used as a direct connect solution when you plug any Plantronics H-series headset into a cisco VoiP telephone. When used with the cisco telephone, no amplifier is used. Coiled cord connects any H-Series headset with Quick-Disconnect plug to compatible Plantronics amplifiers, or phones with compatible headset ports.
Replacement Coiled Cord
Quick Disconnect To Male Modular Plug
For Use With H Series Headsets