The choice for a system relies on your needs, not what’s latest.
Security is an easy issue to handle and not to be a concern. Network is incredibly important and a low cost redundant backup network is imperative for the success of a VoIP implementation for a large system. Then you need to at least consider the schools mobile strategy and consumption of bandwidth, when looking at solutions.
All that aside…consider who you want to work with and what skills they bring to the table to help you analyze what solutions can be brought to the table, or if you just need there help to guide you in the evaluation process.
If you need any assistance in these areas, let us know.
We are here to help.