General
● You must reduce international long distance calling costs, and lower support and administration costs for the IP-PBX and ACD solutions.
● You must implement voice survivability for all the sites in case of a wide area network (WAN) link failure.
● Where possible, you must optimize media paths.
● The solution must be resilient to the failure of mediation server pools.
● The maximum concurrent peer-to-peer connections between Moscow and Berlin will be 196.
● Response groups must be managed by dedicated response group administrators.

Gateways
● Existing gateways do not support the REFER method. You must use the existing gateways with Skype for Business to provide PSTN connectivity.
● In the event of a failure of both gateways at any office, all international calls from that office must route through the Moscow gateways.

Outbound calls
● All calls placed to Russia from any office must route through the Moscow gateways.
● Germany experiences high public switched telephone network (PSTN) call volume. All calls for Germany must breakout from Berlin in the event of Mediation Server pool failure in Berlin.
● All PSTN calls to Germany must use Berlin gateways in the event of Mediation Server pool failure in Berlin.

You need to configure the trunks defined in the Skype for Business topology based on the requirements.

Which two actions should you perform? Each correct answer presents part of the solution.

A. Disable REFER support.

B. Enable media bypass.

C. Set Encryption Support Level to required.
D. Enable centralized media processing.