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# 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`** `object` — required

Audio-stream metrics for the most recent sample window.

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**`audio.jitter`** `number` — required

Audio jitter in seconds.

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**`audio.packetsLost`** `number` — required

Audio packets lost since the start of the call.

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**`audio.packetsReceived`** `number` — required

Audio packets received since the start of the call.

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**`availableOutgoingBitrate`** `number`

Estimated available outgoing bitrate in bits per second.

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**`roundTripTime`** `number` — required

Current round-trip time in seconds.

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**`timestamp`** `number` — required

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

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**`video`** `object` — required

Video-stream metrics for the most recent sample window.

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**`video.packetsLost`** `number` — required

Video packets lost since the start of the call.

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**`video.packetsReceived`** `number` — required

Video packets received since the start of the call.

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