Some of the old software before 2010 may not be able to install/run normally on x64 or Windows 10 systems. Be aware of it before purchasing it.
Live Communications Server 2005 (LCS 2005) is the second version of a SIP based instant messaging and presence server after Live Communications Server 2003. LCS 2005 was first released in 2005, and was updated with new features with Service Pack 1 in 2006.
This product allows SIP clients to exchange IM's and presence using the SIMPLE protocol. The client also allows two clients to set up audio/video sessions, application sharing, and file transfer sessions.
The product was released in two editions, Standard Edition and Enterprise Edition. The Standard Edition uses a Microsoft SQL Server Desktop Engine (MSDE) (included with the product) to store configuration and user data. Enterprise Edition uses a full version of Microsoft SQL Server.
System Requirements• Windows Server 2003, Standard/Enterprise/Datacenter Edition
• Only Support SQL Server 2000 (SP3/SP4)
• Active Directory (Windows 2000 or Windows Server 2003)
• Public key infrastructure (PKI)