STD

{
  "id": "MLC-T-IND-005632",
  "term": "STD",
  "field": "Industrial and trades",
  "definition": "An abbreviation for Subscriber Trunk Dialing, a system that allows telephone subscribers to dial long-distance calls directly without operator assistance. The implementation of STD required a network of automated exchanges and a structured numbering plan that included area codes to route calls between different geographic zones. In North America, this system is known as Direct Distance Dialing (DDD).",
  "subject": "Electrical engineering",
  "translations": {
    "de": "STD",
    "es": "STD",
    "fr": "STD"
  },
  "url": "https://mlchart.com/terminology/industrial/std/"
}