The Dialogic® 4000 Media Gateway Series (DMG4000 Gateways) is a set of integrated systems designed to connect Microsoft® Office Communications Server 2007 R2 to existing PBX systems and PSTN networks. Based on a standard rack-mount server running the Windows® Server 2008 x64 operating system, the Dialogic® 4000 Media Gateways are basic hybrid media gateways which are designed, and certified, for the Microsoft® Office Communications Server 2007 R2 and therefore include the role of Mediation Server, which is Microsoft’s technology providing PSTN and PBX interoperability, high-fidelity VoIP, and security.

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