OCS 2007 builds on the foundations and services that Live Communications Server 2005 and MOC 2005 delivered.

OCS 2007 is now integrated with Exchange Server distribution lists.

OCS 2007 now supports the ICE framework of protocols, allowing users to take advantage of its new features wherever those users are located.

The Standard Edition provides full functionality for small organizations.

The Enterprise Edition: Consolidated Configuration provides scalability and high availability while at the same time being relatively easy to plan, deploy, configure, and maintain.

The Enterprise Edition: Expanded Configuration offers maximum capacity, performance, and availability for large organizations.

The Front-End Server is responsible for handling all signaling among and between servers and clients.

The Edge Server resides in the perimeter network and provides connectivity for external users and public IM connections.

The Mediation Server provides signaling and media translation between the VoIP infrastructure and a basic media gateway.

The Archiving and CDR Server provides archiving for all IM conversations and for all CDRs for all users.

Determine your key planning decisions.

Select your topology.

Plan your deployment path.

Prepare your infrastructure.

Review your system and network requirements.

Plan for your external users.

Plan for deploying load balancers.

Plan for VoIP.

Plan for Address Book Server.

Plan for high availability and fault...