A HLDC Station is a given point of transmission along a route implementing HLDC.
Primary Station
The Primary Station controls the operation of the link.
Note
Any frames issued are known as commands.
Secondary Station
The Secondary Station exists under control of the primary station.
Note
Any frames issued are known as responses.
Combined Station
The Combined Station is an instance of a primary station and secondary station sharing an implementation.
Note
The Combined Station may issue commands or responses.
