[
  {
    "timestamp": "2026-09-02T07:05:10.972Z",
    "ward": "5階病棟",
    "roomNumber": "不明/緊急",
    "extension": "86504"
  },
  {
    "timestamp": "2026-08-26T03:01:48.022Z",
    "ward": "5階病棟",
    "roomNumber": "不明/緊急",
    "extension": "86504"
  },
  {
    "timestamp": "2026-08-26T00:06:51.706Z",
    "ward": "5階病棟",
    "roomNumber": "不明/緊急",
    "extension": "86504"
  },
  {
    "timestamp": "2026-08-25T23:55:15.397Z",
    "ward": "4階病棟",
    "roomNumber": "999",
    "extension": "9999"
  }
]