Avaya's IP Office 500 offers backward compatibility for most Nortel Phone Systems in the market today and is one of the few phone systems that supports both digital and IP Phones. Worried that you can't afford to upgrade your current infrastructure to support VoIP but want to have a system that can support you as you transition to VoIP? Then the Avaya IP Office 500 is the right system for you. It can handle from 4 handsets to 384 handsets with 10 sites. Additionally you can use VPN IP Phones to connect back to the office from your home or hotel and not miss a single call. Call us today to discuss what the Avaya IP Office 500 can do for you.