Professional Single Ear Noise Cancelling Office/Call Centre Headset With HIS Bottom Cable For Avaya IP 1608, 1616, 9601, 9608, 9611, 9611G, 9620, 9620C, 9620L, 9621, 9630, 9640 + many more : Amazon.co.uk: Electronics & Photo
RJ9 Avaya Phone Headset Compatible with Avaya 1600, 9600, J100 Series IP Phones Model Noise Cancelling Plus 3.5mm Adapter for Smartphone: Amazon.co.uk: Electronics & Photo
MAIRDI Telephone Headset with Noise Cancelling Microphone & HIS Cable for Avaya IP 1608 1616 9601 9608 9611 9611G 9620 9621 9630 9631 9640 9641 9650 9670 J139: Amazon.co.uk: Electronics & Photo