Plantronics 2.5mm Quick-Disconnect Adapter for Cisco Phones
We recommend consulting the manufacturer's telephone compatibility guide before purchasing headsets. Please find the guide here
Plantronics 2.5mm to Quick-Disconnect Adapter Cable for use with Cisco SPA500 series Phones and Plantronics H-Series Headsets. This adapter is required when connecting the H-series corded headsets to a Cisco phone.