The service provider that you work for decided to offer its business customers a new, hosted unified communications service. This service will allow the service provider to maintain in its data…

The service provider that you work for decided to offer its business customers a new, hosted unified communications service. This service will allow the service provider to maintain in its data centers all the call managers and related hardware and software so that businesses can outsource this function to your company. Engineering has crafted a rollout plan for this new service. From the NOC support perspective, what are the three main considerations to take into account to support the new service? (Choose three.)