The FRA Test car was verbally calling out every control point that this car passed over the radio.
A control Point is any signal and/or switch that the dispatcher controls.
This car apparently had too FEW axles in order to normally activate the CTC signal system.
Here is a photo of an FRA test car that is similar to the car that just ran over the Tehachapi Loop:
[
67.15.20.45]
OR the full page from railp;ictures dot net (for those who wish to brave the pop-ups):
[
www.railpictures.net]
I hope this answers your question!
--- Daniel