What outcome is typically seen from using tandem switches in telecommunications?

The use of tandem switches in telecommunications is primarily intended to facilitate increased connectivity between distant offices. Tandem switches act as intermediaries that process calls between different exchanges or switches, allowing for efficient routing of communication over large networks. This capability is particularly important for connecting multiple local offices that may not be directly linked, thus enhancing the overall effectiveness of the telecommunications infrastructure.

The option regarding reduced number of end offices focuses on a different aspect of network design and doesn't directly align with the primary function of tandem switches, which is about interconnections rather than the diminishing need for localized switches. While improvements in direct trunking rates and lower operational costs may result from broader technological advancements within the telecommunications field, these are not the direct outcomes attributed to the specific purpose of tandem switches.