The most popular AVAYA products:

6408D PLUS
6408 PLUS
AVAYA ONE-XTM
INDEX DT1
6416D PLUS
INDEX TT5
6416 VOICE TERMINAL
PARTNER PHONE
HL10
6416D PLUS M
2010
IP OFFICE 2410 PHONE
2050
IP OFFICE 5420 PHONE
2410 DIGITAL TELEPHONE (RELEASE 2)
LKA10
PARTNER PHONE
6424D PLUS M
2420 DIGITAL TELEPHONE
2030
6408 VOICE TERMINAL
8410 VOICE TERMINAL
2060
6424VOICE TERMINAL
PARTNER MAIL
2410 DIGITAL TELEPHONE
2402 DIGITAL TELEPHONE
IP OFFICE 5410 PHONE
6424D PLUS
2420 DIGITAL TELEPHONE (RELEASE 4)
INDEX TT3
IP OFFICE VOICEMAILPRO
ABT35-USB