The CEHS-AV 03 cable is ideal for all users of professional wireless headsets, in combination with one of following EHS-compatible Avaya desk phones: Avaya 1400 series Avaya 9400 series Avaya 9500 series, as well as SDW 5066, SDW 5065, SDW 5036, SDW 5035,SDW 5015, SDW 5016, DW Office, DW Office ML, DW Pro 1, DW Pro 1 ML, DW Pro 2, DW Pro 2 ML, SD Office, SD Office ML, SD Pro 1, SD Pro 1 ML, SD Pro 2, SD Pro 2 ML and D 10 Phone.