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Microsoft Live Communications Server 2005 or Microsoft Office Communications Server 2007

Both products, Microsoft Live Communications Server 2005 (LCS 2005) and Microsoft Office Communications Server 2007 (OCS 2007) enable instant messaging (IM), live collaboration, SIP telephony, and integration with telephony systems. Both products are offered in a standard and an enterprise edition.

Standard Edition is geared towards smaller, simpler network configurations. It supports up to 20,000 users. Live Communications Server 2005 Standard Edition is a standalone server -- it operates without an external SQL Server.

Enterprise Edition is designed for larger, more complex networks. It supports installations with up to 125,000 users. It requires an external database.

Active Directory

The Microsoft Live Communications Server 2005 and the Microsoft Office Communications Server 2007 rely on Active Directory Services for authenticating, authorizing, provisioning, and configuring Live Communications Server.

Microsoft Exchange Server

Communicator 2005 and Address Book Service are designed to integrate with the Exchange and Outlook environment to an even greater degree of presence. Communicator 2005 can work without Exchange. With Exchange, users can include scheduling and calendar information with their presence status.

Remote Call Control Gateway

AE Services performs the role Remote Call Control Gateway or RCC Gateway. Communicator 2005 and Communicator 2007 use a standards based CTI protocol, and AE Services converts the protocol used by Communicator 2005 to the CTI protocol supported by Avaya Communication Manager.

noteNote

The AE Services implementation for Microsoft Office Communication Server is not a SIP proxy (a server that processes and forwards SIP requests between calling and called parties). AE Services acts as a Remote Call Control Gateway.

Quick Search

The search facility in Communicator 2005 and Communicator 2007 saves time and improves efficiency. Communicator does this by storing a local address database on the client instead of retrieving it from a network server. As a result, search queries are much faster.

Address Book and Contacts in Communicator

The Address Book Service has a dual role: