---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/events/event-types/voice-insights/voice-sdk-events#article
headline: Voice SDK Events
description: List of Voice Insights event types regarding Voice SDK Events available in Twilio Event Streams, as well as their JSON schemas and examples.
url: https://www.twilio.com/docs/events/event-types/voice-insights/voice-sdk-events
inLanguage: en
dateModified: 2026-10-12T19:18:47.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# Voice SDK Events

## Captured

`com.twilio.voice.insights.call-event.sdk`

Voice SDK Events Captured events are compatible with Webhook and Kinesis sinks. To learn more, you can get started with the [Webhook](/docs/events/webhook-quickstart) or [Kinesis](/docs/events/eventstreams-quickstart) quickstarts and refer to the [product documentation](/docs/voice/voice-insights/advanced-features).

**Examples**

```json
{
  "specversion" : "1.0",
  "type" : "com.twilio.voice.insights.call-event.sdk",
  "source" : "AB00000000000000000000000001",
  "id" : "NO00000000000000000000000001",
  "dataschema" : "https://events-schemas.twilio.com/VoiceInsights.CallEvent/3",
  "datacontenttype" : "2025-10-08T07:17:02.363Z",
  "data" : {
    "timestamp" : "2021-05-24T14:15:22Z",
    "call_sid" : "CA0000000000000000000000000000001",
    "account_sid" : "AC0000000000000000000000000000001",
    "edge" : "ashburn",
    "name" : "call.connected",
    "group" : "call",
    "level" : "UNKNOWN",
    "carrier_edge" : {
      "metadata" : {
        "region" : "us1",
        "twilio_ip" : "172.0.0.130",
        "external_ip" : "172.0.0.130",
        "edge_location" : "ashburn"
      }
    },
    "client_edge" : {
      "metadata" : {
        "region" : "us1",
        "twilio_ip" : "172.0.0.130",
        "external_ip" : "172.0.0.130",
        "edge_location" : "ashburn"
      }
    },
    "sip_edge" : {
      "metadata" : {
        "region" : "us1",
        "twilio_ip" : "172.0.0.130",
        "external_ip" : "172.0.0.130",
        "edge_location" : "ashburn"
      }
    },
    "sdk_edge" : {
      "error" : {
        "code" : 31600,
        "message" : "Call failed due to network issues."
      },
      "feedback" : {
        "score" : 1,
        "reason" : "excellent_audio"
      },
      "metric" : {
        "threshold" : 0.5,
        "values" : [
          0.1
        ]
      },
      "ice_candidate_pair" : {
        "remote" : {
          "type" : "host",
          "protocol" : "udp"
        },
        "local" : {
          "type" : "host",
          "protocol" : "udp"
        }
      },
      "metadata" : {
        "client_name" : "MyVoiceApp",
        "location" : {
          "lat" : 20.956036,
          "lon" : -157.23793
        },
        "city" : "San Francisco",
        "country_code" : "US",
        "country_subdivision" : "CA",
        "ip_address" : "172.0.0.130",
        "sdk" : {
          "type" : "Voice",
          "version" : "2.0.0",
          "platform" : "iOS",
          "region" : "us1",
          "selected_region" : "us1",
          "browser" : {
            "name" : "Chrome",
            "major" : "89",
            "version" : "89.0.4389.90"
          },
          "os" : {
            "name" : "Windows",
            "version" : "10"
          },
          "device" : {
            "model" : "iPhone",
            "type" : "mobile",
            "vendor" : "Apple",
            "arch" : "ARM"
          },
          "engine" : {
            "name" : "Blink",
            "version" : "89.0.4389.90"
          },
          "edge_location" : "ashburn"
        }
      }
    },
    "conversation_relay_data" : {
      "session_id" : "VX0000000000000000000000000000001",
      "name" : "conversation-relay-event-example-all-in-one",
      "sequence_number" : 1,
      "tts_latency" : {
        "latency_ms" : 230
      },
      "stt_latency" : {
        "latency_ms" : 150
      },
      "interrupt" : {
        "type" : "DTMF"
      },
      "last_token_received" : {
        "total_tokens" : 128,
        "total_words" : 42
      },
      "configurations" : {
        "configurations" : {
          "voice" : "3liN8q8YoeB9Hk6AboKe-1.0_0.7_0.8",
          "ttsProvider" : "block_elevenlabs",
          "transcriptionProvider" : "deepgram",
          "debug" : "[SPEAKER_EVENT_REPORT]",
          "speechProvider" : "nova-3-general",
          "transcriptionLanguage" : "en-US",
          "welcomeGreetingInterruptible" : "TRUE",
          "partialPromptOnHangup" : "false",
          "interruptible" : "TRUE",
          "partialPrompts" : "false",
          "interruptOptions" : "InterruptOptions{interruptConfidenceThreshold=0.8, ignoreBackchannelForInterrupt=false, interruptCheckThresholdType=by-chars, interruptInputLengthThreshold=5}",
          "preemptible" : "FALSE",
          "dtmfDetection" : "true",
          "ttsLanguage" : "en-US",
          "reportInputDuringAgentSpeech" : "NONE",
          "speechTimeout" : "0"
        },
        "languages" : {
          "es-US" : {
            "tts_provider" : "block_elevenlabs",
            "voice" : "94zOad0g7T7K4oa7zhDq-0.9_0.7_0.8",
            "transcription_provider" : "deepgram",
            "speech_model" : "nova-2-general"
          },
          "en-US" : {
            "tts_provider" : "block_elevenlabs",
            "voice" : "3liN8q8YoeB9Hk6AboKe-1.0_0.7_0.8",
            "transcription_provider" : "deepgram",
            "speech_model" : "nova-3-general"
          }
        }
      },
      "language_changed" : {
        "tts_language_code" : "es-US",
        "transcription_language_code" : "es-US"
      },
      "call_wrap_up" : {
        "duration_in_seconds" : 185,
        "end_status" : "ended"
      },
      "error" : {
        "error_code" : 54000,
        "message" : "ConversationRelay session encountered an error."
      }
    }
  }
}
```

**Versions**

* [v3 (latest)](https://events-schemas.twilio.com/VoiceInsights.CallEvent/3)
* [v2](https://events-schemas.twilio.com/VoiceInsights.CallEvent/2)
* [v1](https://events-schemas.twilio.com/VoiceInsights.CallEvent/1)