EHS Adapter HHC for Avaya 2400, 4600, 5420 & 5620 | Business Telecom Products
Amazon.com: Jabra LINK 20 EHS Adapter for Avaya : Electronics
Avaya Compatible Vtech Wireless Desk and PC Headset - VH6210 with Avaya EHS Adapter | USB PC and Compatible Avaya Models: 1400, 9400, 9500 Series and Avaya 96x1 IP series