What is the primary difference between the fiber distribution hub (FDH) and fiber access terminal (FAT)?

The primary distinction between the fiber distribution hub (FDH) and the fiber access terminal (FAT) lies in their usage and design, particularly focusing on installation ease and fiber count. The fiber access terminal is generally designed to accommodate lower fiber counts than the fiber distribution hub, making it a more straightforward solution for installations, especially in scenarios with fewer connections. The simplicity of the FAT allows for easier and quicker deployment, which is a significant advantage in various applications, particularly in residential deployments. This characteristic makes the FAT very suitable for areas with less demand for high-density fiber connections.

The fiber distribution hub, on the other hand, is built to manage a larger number of fibers, typically catering to commercial setups with more extensive network demands. While the FDH offers benefits in terms of scalability and capacity, this often translates into a more complex installation process. Thus, the comparison of ease of installation and fiber capacity helps to clarify why the answer focused on the FAT's lower fiber counts and simpler installation process.