# Call Quality Metrics

DevFeed: [Call Quality Metrics](<https://devfeed.tech/articles/call-quality-metrics-1743.md>)

Original publisher: [Read original article](<https://signal.org/blog/call-quality-metrics/>)

Published: 2013-03-30T00:00:00Z

Content type: article

Language: en

Sources: [Signal Blog](<https://devfeed.tech/sources/signal-blog.md>)

Topics: [Mobile](<https://devfeed.tech/topics/mobile.md>), [telemetry](<https://devfeed.tech/topics/telemetry.md>), [Latency](<https://devfeed.tech/topics/latency.md>), [Android](<https://devfeed.tech/topics/android.md>), [Amazon S3](<https://devfeed.tech/topics/amazon-s3.md>), [Heroku](<https://devfeed.tech/topics/heroku.md>), [Encryption](<https://devfeed.tech/topics/encryption.md>), [JSON](<https://devfeed.tech/topics/json.md>)

Tags: [amazon-s3](<https://devfeed.tech/tags/amazon-s3.md>), [android](<https://devfeed.tech/tags/android.md>), [data](<https://devfeed.tech/tags/data.md>), [json](<https://devfeed.tech/tags/json.md>), [latency](<https://devfeed.tech/tags/latency.md>), [metrics](<https://devfeed.tech/tags/metrics.md>), [mobile](<https://devfeed.tech/tags/mobile.md>), [server](<https://devfeed.tech/tags/server.md>)

## AI overview

The article describes an opt-in call quality metrics system for the RedPhone Android client. It collects anonymized performance data and optional user feedback to help investigate call degradation, including dropped calls, echo, latency, volume, packet delivery, audio gaps, CPU load, and memory usage. Encrypted JSON data is stored locally during calls and uploaded to a Heroku server using Amazon S3 for persistence.

## Source excerpt

Spring Break Of Code, Day Six Because secure systems aren't valuable if they're not used, Whisper Systems has always focused on delivering strong cryptography alongside a great user experience. That's the reason call quality has always been a priority in RedPhone's development. We know that, for many users, RedPhone has consistently delivered a call quality experience comparable to commercial mobile VoIP solutions. But we also hear from users who report problems like dropped calls, distracting levels of echo and latency, or inaudibly low in-call volume. While we investigate these reports and attempt to resolve them, we don't have a clear view of what situations cause RedPhone's call quality to degrade, or how to prioritize our development efforts. Read more...