The Quality dashboard in the DI Voice portal shows call audio quality for your account over a selected time period. Use it to spot problem calls and see how quality trends over time.
Setting the Date Range
By default, the dashboard shows the last 7 days. Use the date range selector buttons in the top-right corner to view a custom range or a preset window.
If you choose to view data from the last 24 hours, data is grouped into hourly buckets. If you view data from a selected period of days, data is grouped into daily buckets. This is the default view.
Audio Quality and Call Volume
This chart is the first thing to check — it shows call volume by day, color-coded by quality:
Green (Excellent) — high-quality calls
Yellow (Fair) — calls with noticeable but minor issues
Red (Poor) — calls with significant quality problems
Taller bars mean more calls that day. A spike in red or yellow bars signals a day worth investigating further.
Audio Quality Distribution
This donut chart shows what percentage of all calls in the selected period fall into each quality tier (Excellent, Fair, Poor), along with the total call count. Use this to get a quick read on overall call health — for example, "99% Excellent, 1% Poor" tells you problems are rare but present.
Device Registration
This donut chart shows what percentage of devices on your account are currently registered versus offline. An offline device can't make or receive calls, so a high offline percentage is worth checking even if call quality itself looks fine.
Lowest Quality Calls
This table lists your worst individual calls, sorted by MOS score (lowest first). This is where you'd drill in after spotting a problem in the charts above. Each row shows:
Time — when the call occurred
Direction — internal, inbound, or outbound
From / To — the calling and receiving numbers
Duration — call length
MOS — quality score (color-coded red if poor)
Jitter — timing variation in the audio stream, in milliseconds
Packet (Pkt) Loss — percentage of audio data lost during the call
A call with high packet loss and a low MOS score (like the example below showing 38.3% packet loss and a 1.86 MOS) is a strong candidate for troubleshooting — check the device, network connection, or carrier route involved.
What is MOS?
MOS stands for Mean Opinion Score. It is the industry-standard measurement of voice call quality. MOS is scored on a scale from 1 to 5. A higher score means better quality.
MOS Score | Quality Rating | Perceived Quality |
4.3 – 5.0 | Excellent | Sounds the same as an in-person conversation |
4.0 – 4.3 | Good | Minor issues; callers likely won't notice |
3.5 – 4.0 | Fair | Occasional, noticeable glitches |
3.0 – 3.5 | Poor | Callers are likely to complain |
Below 3.0 | Unacceptable | Conversation is difficult to follow |