curl --request GET \
  --url https://api.voxo.co/v2/admin/extensions/{id} \
  --header 'Authorization: Bearer <token>'

{
  "id": 123,
  "tenantId": 123,
  "userId": 123,
  "name": "<string>",
  "number": "<string>",
  "peerName": "<string>",
  "dnd": "<string>",
  "callerIdNumber": "<string>",
  "enableMeet": 123,
  "enableTranscription": 123,
  "type": "<string>",
  "trunk": "<string>",
  "trunkHost": "<string>",
  "trunkCallerIdSource": "<string>",
  "trunkEmergencyCallerIdOverride": "<string>",
  "callLimit": 123,
  "mailboxAddress": "<string>",
  "includeInDialByName": "<string>",
  "includeInPhonebook": "<string>",
  "recording": "<string>",
  "recordingEmail": "<string>",
  "dialTimeout": 123,
  "outboundDialPrefix": "<string>",
  "emergencyLocationComment": "<string>",
  "enableDirectFax": 123,
  "enableForwarding": "<string>",
  "efaxUser": {
    "id": 123,
    "name": "<string>",
    "email": "<string>",
    "callerIdNumber": "<string>"
  },
  "branch": {
    "id": 123,
    "name": "<string>"
  },
  "user": {
    "id": 123,
    "email": "<string>"
  },
  "emergencyLocation": {
    "id": 123,
    "address": "<unknown>"
  },
  "musicOnHold": {
    "id": 123,
    "name": "<string>"
  },
  "routingProfile": {
    "id": 123,
    "name": "<string>",
    "type": "<string>"
  },
  "devices": [],
  "noAnswerDestinations": [],
  "busyDestinations": [],
  "offlineDestinations": [],
  "forwardingDestinations": []
}