Built on an open source foundation, with the collaboration of the open source community in the SIPFoundry Project, Nortel’s new SCS500 (Software Communications System) provides small and medium businesses from 30 to 500+ employees with an affordable unified communications solution. The SCS500 is a SIP-centric unified communications product that provides instant messaging, presence, IP telephony, conferencing, and other unified communications capabilities. Nortel believes that there are 5 key elements to unified communications for the SMB market: productivity, efficiency, flexibility, cost savings, and mobility. They believe that the SCS500 delivers on each of these elements. The SCS500 is offered on popular Dell and IBM server platforms. You can learn more about the Nortel SCS500 in this CNNMoney.com article.