The Office Communications Server 2007 R2 application programming interface (API) is built on the Session Initiation Protocol (SIP) proxy platform and implemented using the following:

The following figure shows how the API architecture is implemented for Front End Servers.

Figure 1. API architecture for Front End Servers

SIP-aware managed server applications that are developed by using the managed server API platform extend the core services available in Office Communications Server2007 R2. Managed server applications include both of the following:

The managed server API for implementing these applications functions as follows:

Following are the two major components of the server API module (Apiem.dll) that support implementation of managed server applications:

See Also