Mediation server improvements in Lync 2013
In Lync 2013, we have some improvement features that were partially present in the 2010 version:
M:N trunk routing: This is an evolution of the 1:N relation that enabled us to associate multiple gateways to a single Mediation server. Now we can associate the following:
A single Mediation server to multiple gateways
A single gateway to a single Mediation server with multiple trunks
A single gateway to multiple Mediation servers
Inter-trunk routing: With this feature, Lync 2013 is enabled to act as a gateway between two or more different PBXs or to connect a PBX to a PSTN gateway.
Caller ID: This is an option to translate the calling phone number from the E.164 format to the local dialing format (it may be required by the gateway).
Hybrid voice: The on-premise deployment is now able to work with users hosted in the cloud on Office 365.