Office Communications Server 2007 R2 is designed to use Differentiated Service (DiffServ) types to provision audio and video communications to all unified communications (UC) enabled users on its supporting network. In most cases, deploying DiffServ with a Communications Server 2007 R2 deployment requires additional administrative configuration to ensure that the DiffServ implementation is compliant with the network that is hosting Communications Server2007 R2. The Windows server and client operating systems supported by Communications Server 2007 R2 provide the DiffServ policy implementations to ensure compliance for the default DiffServ audio and video service types on most networks, along with most of the enterprise level tools that are needed to troubleshoot and complete the Communications Server 2007 R2 DiffServ implementation.

Author: Michael Adkins

Publication date: September 2010

Product version: Office Communications Server 2007 R2

Differentiated Services (DiffServ) is a mechanism that is designed to help ensure Quality of Service (QoS) for network aware applications that need a compliant way to send and receive prioritized information across an IP network. DiffServ adds Differentiated Services Code Point (DSCP) markings to the IP traffic. These DSCP values are decimal numbers that represent the different levels of delivery for IP traffic that Diffserv can provide. Communications Server 2007 R2 supports the DiffServ delivery standards for use with audio/video conferencing. DiffServ support in Communications Server 2007 R2 enables you to prioritize the flow of audio and video traffic.

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