To directly connect your headset to specific Avaya IP phones, including the following models: 2410, 2420, 4406, 4412, 4424, 4406D+, 4412D+, 4424D+, 4424LD+, 4610SW, 4620, 4620SW, 4621SW, 5410, 5420, 5 more→610, 5620, 6416D+M, 6424D+M, 9404, and 9408. The Quick Disconnect (QD) capability allows the headset to detach without losing the call. Allows easy connection between devices and helps transfer data quickly with accuracy Fully compatible with headsets