You have a Skype for Business Server 2015 Infrastructure. The infrastructure contains two sites and is
configured for Enterprise Voice. The sites are located in Chicago and Toronto. Each site has a distinct
voice policy, public switched telephone network (PSTN) usage, voice route, and trunk transaction rule as
shown in the following table:

You need to ensure that all outbound voice calls to the PSTN from the users in the Toronto site are routed
through the trunk at the Toronto site. Calls must use the Mediation Server at the Chicago site if the
Mediation Server at the Toronto site is unavailable.
What should you do?