In Lync Server 2013, Microsoft has added the capability to associate the following:
A single Mediation Server for multiple gateways
A single gateway for multiple Mediation Servers
A single gateway multiple times with the same Mediation Server
This feature is called many-to-many (M:N) trunk routing, and it allows Mediation Servers to handle multiple logical paths (trunks) from a gateway on multiple different ports. M:N routing adds redundancy and flexibility to Lync deployments. In the following steps, we will see how to enable multiple gateways for a voice route (adding redundancy) and how to use multiple connections to a single gateway to add flexibility in the trunk configuration.
Our initial scenario will include two PSTN gateways (test.wonderland.lab and 2ndtest.wonderland.lab) and a single Mediation Server (madhatter.wonderland.lab). Lync Topology Builder will automatically create two trunks that connect the single Mediation Server to the gateways, as shown in...