The Avaya 1608-I is the mid-tier offering in the 1600 Series for the everyday user.The IP phone is compatible with Avaya Communications Manager and IP Office R6.0 and higher.
This is the English text version which Avaya has discontinued. They have transitioned to the Global version which removes the text from below the buttons. This is the only difference between the Global and Text version. Requires local 5v power supply or POE (802.3af).