Voice Insights Dashboard now allows users to filter based on whether Twilio detected silence on one of the streams in a call. This can be useful in diagnosing reports of dropped calls and one-way audio.
Twilio's media gateways can detect missing RTP streams or streams which contain only silence, and we will tag those calls as having contained silence in the Call Summary. Note that depending on your use case silent calls may be expected. For example, users receiving a one-time password frequently don't verbally respond, which Twilio may (appropriately) detect as silence.
For additional information, see our docs.