said by mlord:
There must be something more to it than just that last sentence -- I can take my TSI Modem to a different CMTS and it still works just fine, thanks. So it's not locked to the CMTS, but perhaps it is locked to the POI instead?
Actually, on reflection, I bet the answer is "both."
The modems probably are locked (or "local") to specific CMTSs, but not just a single CMTS -- the teksavvy modem database likely gets replicated in part/whole across many CMTSs in the region.
I say this because when I had an 11-day outage here this past summer, my modem did work on other CMTSs off the same POI, just not on my own local CMTS for some reason. So that does support the "local to a CMTS" theory, though likely several CMTSs, not just a single CMTS.