Digital Telephones (1400, 2400, 4400, 5400, 6400 & 9500) Digital Telephones (1400, 2400, 4400, 5400, 6400 & 9500) Avaya 1400 Series Digital Telephones (6) Avaya 9500 Series Digital Telephones (4) Avaya 2400 Series Digital Telephones (3) Avaya 5400 Series Digital Telephones (3) Avaya 4400 Series Digital Telephones (6) Avaya 6400 Series Digital Telephones (3)
