Extension

{
  "id": "MLC-T-IND-002123",
  "term": "Extension",
  "field": "Industrial and trades",
  "definition": "A telephone connected to a private branch exchange, or an additional telephone sharing the line of a main set, reached by a short internal number. On a PBX, users dial the extension number, usually three or four digits, to call each other without using outside lines. An extension number is also used to transfer an outside call to a particular desk or person.",
  "synonyms": [
    "denotation"
  ],
  "subject": "Electrical engineering",
  "see_also": [
    "demarc extension",
    "extension cord",
    "extension reel"
  ],
  "translations": {
    "de": "Nebenstelle",
    "es": "extensión",
    "fr": "poste téléphonique"
  },
  "url": "https://mlchart.com/terminology/industrial/extension/"
}