So when actually taking time to analyze the KRC phone logs in the future:

  • Outgoing menu numbers only increased after May 2016, when we allocated several phones to show the menu/addon as the caller ID. (Not show what the previous ones are, and that bump in June 2016)
  • addons don’t seem to be counted
  • Wrong numbers and yongho cell phone usage dies after July 2015 – merge into regular LA