The CEHS-AV 05 cable makes calls convenient to manage – thanks to easy set-up, single-button operation as well as efficient answering/ending of calls. CEHS-AV 05 is compatible with the wireless IMPACT 5000, IMPACT DW, IMPACT SD and IMPACT D 10 headset Series together with the following EHS-compatible phones: Avaya IP desk phones 2420, 5420, 4610, 4610SW, 4620, 4620SW, 4621, 4621SW, 4622, 4622SW, 4625, 4625SW, 4630, 4630SW, 5610, 5620, 5621 and 5625. Please check headset compatibility guide for more information.