Perhaps this objection is the most frequent, so pay special attention to preparing for an answer with your team beforehand.
Your answer. If Internet or power outages occur in your office, a cloud PBX service will continue to operate, and all features and data will be saved. If the landline phones in the office go down, mobile phones will still work, you won't miss any calls, and you can view all the information in your account remotely. In our data center, there will be no outage.
Nevertheless, if you want to be always online, you can get a backup source of connectivity that guarantees uninterrupted Internet access. As usual, companies pay an additional cost for a backup connection, which completely solves the problem.
Comment. It is crucial to show that cloud-based PBXs are much better than on-premises alternatives (and they, indeed, are more secure because the professionals on the vendor’s side take on maintaining the cloud-based solution).
Some clients may have concerns about potential downtime, latency, and compatibility issues. To alleviate these concerns, demonstrate how you employ redundancy, backup, and recovery systems to guarantee the high reliability of your cloud PBX.