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

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Inter-Trunk Routing

In previous versions of Lync Server 2010, all calls had to either start with or terminate on a Lync endpoint. There was no way to route calls through Lync Server between two IP PBXs or gateways. Inter-trunk routing in Lync Server 2013 allows for this scenario to take place, which might help organizations gradually move users to Enterprise Voice. Lync Server 2013 can be deployed as shown in Figure 2.7, such that it is “in front of” an existing PBX, and owns the core routing logic that allows calls to still reach users on a legacy PBX, or even allows calling between two existing PBX systems.

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Figure 2.7. Inter-trunk routing.

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