With a command station, it will listen for any commands that emit from certain devices such as throttles, which it will primarily listen for. This all goes to a booster and then the power that is derived from the power supply is modulated. This is merged with the digital stream that the command station produces. Then, all signals are completely digital.
This will be used for analog to digital conversion, allowing to create a track version which will never vary. Decoders and also switch motors along with crossing gates are typically applied to the track with commands.
Software at the command station may limit the DCC system and this is where the command station dcc system will come in to relieve the limitations. For example, there may be a limit of just 2 different digital addresses. Different trains are then controlled by throttle. Any additional functions can be interpreted by the DCC system.
The existing system can often support more than just two addresses and this all depends on the software being used. Since the dcc command station is a necessary part of keeping the trains on the tracks, it is going to be best to use the most updated systems possible. All returning signals will then be managed better.
Keeping up with safety standards is a vital part of operations, but it is also necessary to keep basic functions in line, literally with the tracks. Any glitches just slow down operations and this is hardly going to be a useful situation. Instead, being sure of the software and components functions as best will be the better approach.
Keeping the trains on the track and switching from the station all depends on the right signals. Since digital signals remain unaltered in transmission, they are the most efficient means of smooth operation.