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 Cable Adapter A10-16 Direct Connect Compatible with Plantronics Headsets, GTW 66268-03 by Global Teck, Compatible with EncorePro, Plantronics, Addasound, VXI : Electronics
Amazon.com: Plantronics HIC Adapter Cable : Electronics
Plantronics HIS Headset Adapter Cable (72442-41) Brand New, 1 Year Warranty | eBay
Amazon.com: U10P-S Adapter RJ9 to QD HIS Cable for Plantronics Quick Disconnect Headsets Coil Cord Compatible with Yealink T20P T21P T26P T23G T46G T48G T42S T46S Avaya 1608 9608 9611 Panasonic Snom