Plantronics | 2.5mm to RJ-9 Cable Kit for Polycom, Vertical, Comdial, Cisco SPA and Panasonic
Amazon.com: Headset Adapter U10, 26716-01 to Connect Cisco Phones' RJ9 Modular Jack for Plantronics H Series Quick Disconnect Headsets : Electronics
Plantronics Extender Connector | For usage with RJ-9 cable and Wireless EHS Adapters | 85638-01 (formerly 40287-05)
Plantronics CS540 Wireless Office Headset System & APC-40 EHS Adapter | 84693-01 and 38350-01
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
Plantronics APU-71 EHS Electronic Hookswitch Adapter for Cisco & Nortel New Box | eBay
DA Series - Smarter digital adapters for Poly QD headsets | Poly, formerly Plantronics & Polycom
Plantronics 38350-13 APC-43 EHS Adapter for Cisco - New
Armor QD to USB Adapter with Inline Controls - Plantronics Compatible
Amazon.com: 2.5mm Jack to QD Bottom Adapter Cable - Plantronics Alternative to fit Phones with 2.5mm Headset Connection for Cisco SPA303,501G,502G 504G,508G,Cisco Linksys SPA921 922,etc : Electronics