vg204 (and vg310) -connected elevator phone ports becoming unreachable

[Wayne Ficklin]

...and we don't have any indication that they're unreachable until calls from the elevator indicate that they're not reachable.  These vgXXX ports are registered to ucm and all indications are that things should work.  Until they don't.

Anyone want to help me solve this?

The problem is that resetting the gateway fixes the problem, whatever it is.  And with the life-safety nature of elevator phones, I don't have a LOT of opportunity to troubleshoot.  That said, I'm open to ideas.

[Wayne Ficklin]

THIS particular issue was resolved because of a network change that involved changing the name of the gateway.  It was showing as unregistered.  Once the name was changed back it registered fine.  So the episode that prompted this post wasn't the best example.  

Still, I'm open to ideas for when this happens again.