1. AI Agent decides to transfer
          ↓
2. Caller placed on hold with music/message
          ↓
3. AI dials destination number
          ↓
4. AI briefs receiving agent
          ↓
5. Receiving agent accepts/declines
          ↓
6. All parties connected (or caller returned to AI)

{
  "transfer": {
    "type": "warm",
    "destination": "+14155551234",
    "brief_template": "Incoming call from {{caller.name}} regarding {{intent}}. They've been on the line for {{call_duration}}.",
    "hold_music": "default",
    "timeout": 30
  }
}

{
  "brief_template": "Hi, I have {{caller.name}} on the line. They're calling about {{intent}}. Key details: {{conversation.summary}}. Ready to connect?"
}

{
  "hold": {
    "type": "music",
    "source": "default",
    "message_interval": 30,
    "message": "Thank you for holding. A team member will be with you shortly."
  }
}

{
  "transfer": {
    "accept_key": "1",
    "decline_key": "2",
    "prompt": "Press 1 to accept this call, or 2 to send to voicemail."
  }
}

{
  "transfer": {
    "auto_connect": true,
    "whisper": "Incoming transfer regarding {{intent}}"
  }
}

{
  "fallback": {
    "action": "voicemail",
    "message": "I wasn't able to reach someone directly. Please leave a message and we'll call you back."
  }
}

{
  "transfer": {
    "type": "warm",
    "destinations": [
      {
        "number": "+14155551111",
        "timeout": 20
      },
      {
        "number": "+14155552222",
        "timeout": 20
      },
      {
        "number": "+14155553333",
        "timeout": 20
      }
    ],
    "fallback": {
      "action": "voicemail"
    }
  }
}

{
  "transfer": {
    "type": "warm",
    "strategy": "simultaneous",
    "destinations": [
      "+14155551111",
      "+14155552222"
    ],
    "first_responder_wins": true
  }
}

{
  "transfer": {
    "type": "warm",
    "routing": {
      "skill": "billing",
      "priority": "high"
    }
  }
}

{
  "skill_groups": {
    "billing": {
      "agents": [
        { "number": "+14155551111", "priority": 1 },
        { "number": "+14155552222", "priority": 2 }
      ]
    },
    "technical": {
      "agents": [
        { "number": "+14155553333", "priority": 1 }
      ]
    }
  }
}

{
  "transfer": {
    "screen_pop": {
      "enabled": true,
      "url": "https://crm.yourcompany.com/call?caller={{caller.phone}}&account={{caller.account_id}}",
      "data": {
        "caller_name": "{{caller.name}}",
        "intent": "{{intent}}",
        "summary": "{{conversation.summary}}",
        "collected_data": "{{data}}"
      }
    }
  }
}

{
  "event": "transfer.completed",
  "call_id": "call_abc123",
  "transfer_id": "transfer_xyz789",
  "destination": "+14155551234",
  "duration_to_connect": 12.5,
  "brief_delivered": true,
  "context": {
    "caller_name": "John Smith",
    "intent": "billing_question"
  }
}