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Microsoft® Lync® Server 2013 Unleashed Second Edition by Randy Wintle, Alex Lewis, David Ross, Tom Pacyk

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Bypass IDs

Media Bypass works by assigning a unique bypass ID to each location, and each subnet associated with that location automatically inherits the same bypass ID. When a Lync endpoint attempts a call, the subnet of the endpoint is examined. If the bypass ID of the subnet matches the bypass ID of the subnet where the media gateway resides, Media Bypass will be allowed.

The same concept applies for inbound calls from the PSTN. When the media gateway receives a call and sees an endpoint with a matching bypass ID, the audio flows directly to the Lync client. Using the network configuration example in Figure 32.8, the San Francisco, San Jose, and Sacramento sites share a bypass ID because they are not bandwidth constrained. The Mendocino and ...

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