Other Telephone Enhancements
Microsoft Office Communications Server 2007 and Microsoft Office Communications Server 2007 R2 will reach end of support on January 9, 2018. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.
Office Communications Server 2007 R2 includes new features supporting Session Initiation Protocol (SIP) trunking and enterprise cellular telephony (also known as "outside voice"). The following topics discuss these features: