What classification is used for telecom systems that span across multiple different sites?

The classification that is used for telecom systems that span across multiple different sites is Class 4. This classification indicates the ability to manage and integrate communication systems that are distributed over various geographical locations, making it suitable for larger networks that require coordination between different sites.

Class 4 systems typically encompass complex architectures, including those that support advanced functionalities such as centralized services and interoperability among diverse technologies across locations. This is particularly important in scenarios that demand robust and flexible communication solutions, such as corporate networks or large-scale operations where various departments or campuses need to be interconnected efficiently.

In contrast, other classes—Class 1, Class 2, and Class 3—do not address multi-site configurations in the same capacity and are generally intended for less extensive applications.