Deluxe headset for Avaya 9640, 9640G, 9641, 9641G models. Best Phone headset + Avaya to Plantronics QD cord.
AVAYA L119 HEADSET | HeadsetsOnly Australia
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
Plantronics HW510 Headset Package for Avaya IP Phones
Jabra Biz 1500 Avaya J100 1600 9600 Certified Headsets
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
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
Avaya L139 | Single-Ear Headset with Quick Connect (700514053)
Amazon.com: OvisLink Avaya Headset for Avaya 1600, 9600 & J100 Series Phones | Corded Call Center Headset with Quick Disconnect Cord | Noise Canceling Microphone | Supreme Voice Quality All-Day : Electronics