The Avaya IP 500V2 Control Unit (700476005) is the latest control unit for the Avaya IP Office system. It supports IP Office R6.0 and higher, as well as IP Office Basic Edition, Essential Edition, Preferred Edition, Advanced Edition, Partner Edition, and Norstar Edition. This control unit is brand new and can be used to expand the capability of your Avaya IP Office system. It is the perfect solution for businesses that require advanced communication tools.