A time server on its own is not a working time source. It needs an antenna to see the satellites, a cable long enough to reach the roof, and surge protection sitting between the two. Ordering those as separate line items is where most first deployments go wrong: the server arrives, the antenna does not, and the surge protector gets discovered halfway through the install.

These bundles ship as a complete, compatible set. Every component is matched to the server it ships with, which matters more than it sounds. Antenna part numbers are not interchangeable across time server families, and the surge protector has to match the antenna's cable topology rather than just the server model.