Amazon.com: QD Adapter HIS Cable for Plantronics and VoiceJoy Headsets QD Adapter for Yealink Phones and Workable for Avaya IP 1608, 1616, 9601, 9608, 9611, 9611G, 9620, 9630, 9631, 9640, 9641, 9650, 9670 : Electronics
Standard 3.5mm Smartphone Headset Headset) Adapter Converter to RJ9 Jack Office Phone FOR Nortel Mitel AVAYA 2400 4600 series - AliExpress
Amazon.com: INNOTALK Headset Compatible with Avaya Nortel Phone 1150e, 3904, M3905, M7308, M7900 - Sound Emphasis Pro Monaural Call Center Noise Cancel Headset with Quick Disconnect RJ9 Headset Adapter : Electronics
Plantronics HIC-10 Headset Adapter Cable for Avaya (49323-46)
Amazon.com: Avaya Headset HD Voice with HIS Adapter Compatible with Avaya 1600, 9600, J100 Series IP Phones Model, Plus 3.5mm Adapter for Smartphone : Electronics
Plantronics HIS Headset Cable | For Avaya J139, J169, J179, 1600 and 9600 series phones, 72442-41
Amazon.com: Avaya Headset HD Voice with HIS Adapter Compatible with Avaya 1600, 9600, J100 Series IP Phones Model, Plus 3.5mm Adapter (Monaural) : Electronics
Plantronics APV-63 Headset Hook Switch Control Adapter, 38734-11 for Avaya phones
Avaya Quick Connect to RJ9 Headset Cable (700514324)
Office Phone Headset with Virtual Compatibility RJ9 Headset Adapter for Cisco Avaya Panasonic and Most Phones - Walmart.com
Amazon.com: RJ9 Avaya Phone Headset Compatible with Avaya 1600, 9600, J100 Series IP Phones Model Noise Cancelling Plus 3.5mm Adapter for Smartphone : Electronics
Amazon.com: Plantronics HIC Adapter Cable for Avaya IP Phones - Headset Cable (49323-44) - : Electronics
USB Plug to RJ9 Headset Adapter For Headset Work with Computer PC Laptop Avaya Nortel Yealink Cisco VIOP POE IP Telephone Skype Video Phone - Walmart.com
Headset Adapter Cable HIS QD cord for Select AVAYA Phones:1608,1616,9610,9620,9620L,9620C, 9630,9630G, 9640 9650 9660 9670 etc - AliExpress
Amazon.com: VoiceJoy 3.5mm Smartphone Headset Adapter to RJ9/RJ10/RJ12 4P4C Plug for Avaya 2400 4600 Series,Nortel,Simense etc.Headset/Handset Plug to iPhone iPad Headset 3.5MM TRRS Plug : Electronics
Plantronics HIS Headset Cable | For Avaya J139, J169, J179, 1600 and 9600 series phones, 72442-41
Avaya Lucent Modular Base Amplifier for Plantronics H HW series Headset to Phone | eBay
Headset Adapter Cable HIS QD cord for Select AVAYA Phones:1608,1616,9610,9620,9620L,9620C, 9630,9630G, 9640 9650 9660 9670 etc - AliExpress
USB Plug to RJ9 Headset Adapter For Headset Work with Computer PC Laptop Avaya Nortel Yealink Cisco VIOP POE IP Telephone Skype Video Phone - Walmart.com
Avaya HIS-1 Headset Adapter Cable (PL-72442-41) - Grade A
PC Headset Adapter for Avaya 1600 and 9600 IP Phone
Avaya DHA Dual Headset Adapter (700501116) – Atlas Phones