said by btech805:What do you mean by watchdog hardware?
Found the time to look into this a bit more on telecom side.
Seems they would use two watchdogs as a minimum (maybe even more).
One to halt state upon detection of over-voltage and to put cards/lines in a protected state. then another to re-init upon that fault detection.
Again I don't know anything about Bells hardware, but whatever bug they have needs to be fixed.
What this individual experienced isn't normal at all.