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Microsoft® Lync Server 2010 Unleashed by Tom Pacyk, Andrew Abbate, Alex Lewis

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Media Bypass

Media Bypass allows Lync endpoints to communicate directly with an IP/PSTN gateway or SIP trunking provider. This feature is a big reason collocation of the Mediation Server with the Front End service is now supported. Instead of having the Mediation Server transcode every PSTN audio call from RTAudio to the G.711 codec, the Lync endpoints can send G.711 audio directly to an IP/PSTN gateway, bypassing Mediation Server entirely. This not only cuts down on the processing required for the Mediation Server, it also improves call quality by removing an additional hop and potential latency.

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