Plantronics Headset adapter cable HIC-1 CE2001 #49323-44-S plugs any Plantronics QD headset into Avaya phones (24xx, 4400 D+, 54xx, 56xx, 64xx series) Part # 49323-44-S (replaces #49323-01). The Quick Disconnect (QD) capability allows the headset to detach without losing the call.
To directly connect your Plantronics headset to select Avaya IP phones, including the following models: