Naming conventions for electronics change as time progresses. I believe the original TMCC combo was referred to as Cab-1 and Command Base, the first Legacy was Cab-2 and Command Base (or Base-2??), and the most recent Legacy iteration is Base-1L/Cab-1L. With this last iteration, I believe the most common vernacular is now Cab1/Base1 for TMCC, Cab2/Base2 for Legacy, and Cab1L/Base1L for the last version. The newest version, as yet undelivered, is only a Cab3 because no hand-held remote seems to be planned.
Chuck