With this EHS you don't need a handset lifter to answer calls away from the desk. Works directly between headset and and deskphones
Compatible With The Following Handsets:
Avaya 2420 ver B On IP switch only
Avaya 2420 IP Ver Firmware> 4.0
Avaya 4610 & 4610SW Firmware> 1.8
Avaya 4620 & 4620SW Firmware> 1.8
Avaya 4621 & 4621SW Firmware> 1.8
Avaya 4622 & 4622SW Firmware> 1.8
Avaya 4625 & 4625SW Firmware> 1.8
Avaya 4630 & 4630SW Firmware> 1.8
Avaya 5620
Avaya 5621
Avaya 5625
Manufacturer Part Number: 14201-19
