> Fetch clean Markdown by appending `.md` to any page URL under https://signalwire.com/docs or requesting it with the HTTP header `Accept: text/markdown`. The root index at https://signalwire.com/docs/llms.txt lists the available documentation indexes.

# QualityLevel

> Simplified quality level for UI indicators, derived from MOS score.

```ts
type QualityLevel = "excellent" | "good" | "fair" | "poor" | "critical"
```

Simplified quality level for UI indicators, derived from MOS score.

> Simplified quality level for UI indicators, derived from MOS score.