In this webcast, we present the software development kit (SDK) for the Microsoft Unified Communications Managed API (UCMA) version 1.0. The SDK includes a SIP-based endpoint API that can provide the flexibility and scalability required by advanced developers to build and integrate server applications, such as alert broadcasters, media control units, and instant messaging (IM) bots, into the Microsoft Office Communications Server 2007 infrastructure.

http://msevents.microsoft.com/CUI/WebCastEventDetails.aspx?culture=en-US&EventID=1032343097&CountryCode=US

 If you just started  looking into UCMA API this webcast might be interesting for you. Its on-demand version is available on msdn site.

 

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