> For a complete index of all SignalWire documentation pages, fetch https://signalwire.com/docs/llms.txt

# CallNetworkMetrics

> Periodic snapshot of network quality metrics for an active call.

A periodic snapshot of network-quality metrics for an active call — RTT, packet loss, jitter, and estimated outgoing bitrate. Emitted on [`call.networkMetrics$`](/docs/browser-sdk/v4/reference/webrtc-call/network-metrics\$); use them to drive a live quality indicator.

## **Properties**

Audio-stream metrics for the most recent sample window.

Audio jitter in seconds.

Audio packets lost since the start of the call.

Audio packets received since the start of the call.

Estimated available outgoing bitrate in bits per second.

Current round-trip time in seconds.

Wall-clock timestamp (ms since epoch) of this sample.

Video-stream metrics for the most recent sample window.

Video packets lost since the start of the call.

Video packets received since the start of the call.