Amazon.com: TruVoice 2.5mm to QD Adapter Cable - Compatible with Plantronics and TruVoice Headsets and connects to - Polycom IP 320, IP321, IP330, IP331, Cisco SPA Phones, AT&T & Cordless Phone with
Plantronics APC-43 Wireless EHS Cable for Cisco Phone 38350-13 85Q55AA
Amazon.com: HIS Adapter Cable Compatible with Plantronics QD Headset to Avaya J100, 1600, 9600 IP Phones: 1608 1616 9608 9610 9611 9620 9621 9630 9640 9641 9650 9670 : Electronics
Amazon.com: Headset Adapter U10, 26716-01 to Connect Cisco Phones' RJ9 Modular Jack for Plantronics H Series Quick Disconnect Headsets : Electronics
Amazon.com: Quick Disconnect Cable to RJ9 Plug Adapter Replacement QD Quick Release for Telephone Cisco 79XX 7940 7960 7970 Series Phones ONLY and Plantronics H-Series Headsets, Plantronics U10-AMP 26716-01 : Electronics
Amazon.com: RJ9 Plug to USB Headset Adapter Compatible with Plantronics Jabra Sennheiser Wireless DECT Headsets for Use with Computers PC Laptop Mac Tablet Window Softphones Devices : Electronics