docs/pon-requirements/olt-states.block

blockdiag {

  // States
  N1 [label = Not-exist, shape = beginpoint];
  N2 [label = Not-exist, shape = beginpoint];
  Discovered [shape = ellipse];
  Pre-provisioned [shape = ellipse];
  Activating [shape = ellipse];
  Active [shape = ellipse, color = "#80ff80"];
  Failed [shape = ellipse, color = "#ff8080"];
  TBD [shape = ellipse, stacked];

  // Transients
  N1 -> Pre-provisioned;
  N2 -> Discovered;
  Pre-provisioned -> Activating;
  Discovered -> Activating;
  Activating -> Active;
  Activating -> Failed [folded];
  Active -> Failed [folded];

}