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

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Trunks and M:N Routing

As organizations began to expand Lync Server 2010 Enterprise Voice services, a common pain point was the fact that PSTN gateways could only be associated with a single Mediation server or pool. This was an improvement over the Office Communications Server 2007 R2 limitation in which each PSTN gateway required a separate Mediation server, but it still created some unnecessary headaches in trying to design a resilient solution.

For example, a common use case for a remote site was to place a Survivable Branch Appliance or Server in the site, and configure a gateway to interact with that server. For redundancy, though, it was desirable to create a separate connection between a Mediation server pool in the datacenter to make ...

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