Plantronics EHS APU-72 Electronic Hook Switch Adapter Cable for Cisco Unified IP Phones; Black | Quill.com
Plantronics 87317-01 APC-45 EHS Adapter Cable Switch Hook for Poly and Cisco | eBay
Plantronics APC-42 EHS adapter Cable for Cisco IP Phone to Savi W740 CS500 WO200 | eBay
Amazon.com: IPD U10 Bottom Adapter Cable with RJ09 Jack Compatible with Plantronics headsets for All Cisco IP 6800,7800,8000 and Some 7900 Series : Electronics
RJ9 Phone Headset - Plantronics Compatible QD Headset + Virtual Compatibility Smart Adapter for Cisco Avaya Nec and Most Phones - Walmart.com
DA Series - Smarter digital adapters for Poly QD headsets | Poly, formerly Plantronics & Polycom