---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/events/event-types/voice-insights/voice-sdk-metrics#article
headline: Voice SDK Metrics
description: List of Voice Insights event types regarding Voice SDK Metrics 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-metrics
inLanguage: en
dateModified: 2026-10-12T19:18:47.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# Voice SDK Metrics

## Captured

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

Voice SDK Metrics 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-metrics.sdk",
  "source" : "AB00000000000000000000000001",
  "id" : "NO00000000000000000000000001",
  "dataschema" : "https://events-schemas.twilio.com/VoiceInsights.CallMetric/2",
  "datacontenttype" : "2025-10-08T07:17:02.363Z",
  "data" : {
    "timestamp" : "2023-10-05T14:48:00.000Z",
    "call_sid" : "CA0000000000000000000000000000001",
    "account_sid" : "AC0000000000000000000000000000001",
    "edge" : "unknown_edge",
    "direction" : "inbound",
    "carrier_edge" : {
      "interval" : {
        "codec" : 0,
        "codec_name" : "pcmu",
        "packets_received" : 0,
        "packets_sent" : 0,
        "packets_lost" : 0,
        "packets_loss_percentage" : 0.0,
        "jitter" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "rtt" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "mos" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_in" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_out" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "latency" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "bytes_received" : 0,
        "bytes_sent" : 0,
        "packet_delay_variation" : {
          "d50" : 20,
          "d70" : 30,
          "d90" : 50,
          "d120" : 70,
          "d150" : 90,
          "d200" : 110,
          "d300" : 150
        }
      },
      "cumulative" : {
        "codec" : 0,
        "codec_name" : "pcmu",
        "packets_received" : 0,
        "packets_sent" : 0,
        "packets_lost" : 0,
        "packets_loss_percentage" : 0.0,
        "jitter" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "rtt" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "mos" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_in" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_out" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "latency" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "bytes_received" : 0,
        "bytes_sent" : 0,
        "packet_delay_variation" : {
          "d50" : 20,
          "d70" : 30,
          "d90" : 50,
          "d120" : 70,
          "d150" : 90,
          "d200" : 110,
          "d300" : 150
        }
      },
      "codec" : 0,
      "codec_name" : "pcmu",
      "metadata" : {
        "region" : "us1",
        "twilio_ip" : "172.0.0.130",
        "external_ip" : "172.0.0.130",
        "edge_location" : "ashburn"
      }
    },
    "client_edge" : {
      "interval" : {
        "codec" : 0,
        "codec_name" : "pcmu",
        "packets_received" : 0,
        "packets_sent" : 0,
        "packets_lost" : 0,
        "packets_loss_percentage" : 0.0,
        "jitter" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "rtt" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "mos" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_in" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_out" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "latency" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "bytes_received" : 0,
        "bytes_sent" : 0,
        "packet_delay_variation" : {
          "d50" : 20,
          "d70" : 30,
          "d90" : 50,
          "d120" : 70,
          "d150" : 90,
          "d200" : 110,
          "d300" : 150
        }
      },
      "cumulative" : {
        "codec" : 0,
        "codec_name" : "pcmu",
        "packets_received" : 0,
        "packets_sent" : 0,
        "packets_lost" : 0,
        "packets_loss_percentage" : 0.0,
        "jitter" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "rtt" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "mos" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_in" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_out" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "latency" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "bytes_received" : 0,
        "bytes_sent" : 0,
        "packet_delay_variation" : {
          "d50" : 20,
          "d70" : 30,
          "d90" : 50,
          "d120" : 70,
          "d150" : 90,
          "d200" : 110,
          "d300" : 150
        }
      },
      "codec" : 0,
      "codec_name" : "pcmu",
      "metadata" : {
        "region" : "us1",
        "twilio_ip" : "172.0.0.130",
        "external_ip" : "172.0.0.130",
        "edge_location" : "ashburn"
      }
    },
    "sip_edge" : {
      "interval" : {
        "codec" : 0,
        "codec_name" : "pcmu",
        "packets_received" : 0,
        "packets_sent" : 0,
        "packets_lost" : 0,
        "packets_loss_percentage" : 0.0,
        "jitter" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "rtt" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "mos" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_in" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_out" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "latency" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "bytes_received" : 0,
        "bytes_sent" : 0,
        "packet_delay_variation" : {
          "d50" : 20,
          "d70" : 30,
          "d90" : 50,
          "d120" : 70,
          "d150" : 90,
          "d200" : 110,
          "d300" : 150
        }
      },
      "cumulative" : {
        "codec" : 0,
        "codec_name" : "pcmu",
        "packets_received" : 0,
        "packets_sent" : 0,
        "packets_lost" : 0,
        "packets_loss_percentage" : 0.0,
        "jitter" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "rtt" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "mos" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_in" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_out" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "latency" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "bytes_received" : 0,
        "bytes_sent" : 0,
        "packet_delay_variation" : {
          "d50" : 20,
          "d70" : 30,
          "d90" : 50,
          "d120" : 70,
          "d150" : 90,
          "d200" : 110,
          "d300" : 150
        }
      },
      "codec" : 0,
      "codec_name" : "pcmu",
      "metadata" : {
        "region" : "us1",
        "twilio_ip" : "172.0.0.130",
        "external_ip" : "172.0.0.130",
        "edge_location" : "ashburn"
      }
    },
    "sdk_edge" : {
      "interval" : {
        "codec" : 0,
        "codec_name" : "pcmu",
        "packets_received" : 0,
        "packets_sent" : 0,
        "packets_lost" : 0,
        "packets_loss_percentage" : 0.0,
        "jitter" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "rtt" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "mos" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_in" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_out" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "latency" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "bytes_received" : 0,
        "bytes_sent" : 0,
        "packet_delay_variation" : {
          "d50" : 20,
          "d70" : 30,
          "d90" : 50,
          "d120" : 70,
          "d150" : 90,
          "d200" : 110,
          "d300" : 150
        }
      },
      "cumulative" : {
        "codec" : 0,
        "codec_name" : "pcmu",
        "packets_received" : 0,
        "packets_sent" : 0,
        "packets_lost" : 0,
        "packets_loss_percentage" : 0.0,
        "jitter" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "rtt" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "mos" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_in" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "audio_out" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "latency" : {
          "min" : 0.0,
          "max" : 10.0,
          "avg" : 5.0,
          "value" : 3.0
        },
        "bytes_received" : 0,
        "bytes_sent" : 0,
        "packet_delay_variation" : {
          "d50" : 20,
          "d70" : 30,
          "d90" : 50,
          "d120" : 70,
          "d150" : 90,
          "d200" : 110,
          "d300" : 150
        }
      },
      "codec" : 0,
      "codec_name" : "pcmu",
      "metadata" : {
        "client_name" : "my_app",
        "location" : {
          "lat" : 20.956036,
          "lon" : -157.23793
        },
        "city" : "Honolulu",
        "country_code" : "US",
        "country_subdivision" : "HI",
        "ip_address" : "172.0.0.130",
        "sdk" : {
          "type" : "twilio.js",
          "version" : "1.2.3",
          "platform" : "web",
          "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" : "webkit",
            "version" : "537.36"
          },
          "edge_location" : "ashburn"
        }
      }
    }
  }
}
```

**Versions**

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