# Broadband Bandwidth

<figure><picture><source srcset="/files/Vz681AfZ9bWzQQ2tSANT" media="(prefers-color-scheme: dark)"><img src="/files/6rxMlvzTAfNGP09CyYwJ" alt="Broadband Bandwidth graph info"></picture><figcaption></figcaption></figure>

### Overview

This chart shows the synchronisation speeds for the broadband line and so can indicate an unstable line or a line which has dropped in speed. If configured, a health alert can be sent when the downstream speed drops below the threshold - the purple line in the chart. This chart is only available for lines which have been set up as [Broadband Clarity by an admin user](https://support.highlight.net/help/admin/edit_watch#features_tab).

### Options and header display

#### Options

Both downstream and upstream speeds are shown by default. Declutter the chart by hiding either using the appropriate checkbox.

<table><thead><tr><th width="151">Option</th><th>Description</th></tr></thead><tbody><tr><td>Downstream - today</td><td>Displayed as green if above the threshold and red if below for 'Today' view only</td></tr><tr><td>Downstream - not today</td><td>Displayed as blue for all historical views other than today</td></tr><tr><td>Upstream</td><td>Displayed as darker blue for <strong>all</strong> views</td></tr><tr><td>Relearn button</td><td>Use this if the current threshold is inaccurate due to changes on the line. Relearning the threshold can take a period of days, depending on the settings in the <a href="https://support.highlight.net/help/admin/alerting_thresholds#broadband">Alerting Thresholds dialog</a></td></tr><tr><td>Reset zoom button</td><td>If you click, hold and drag across the chart to zoom in then this button appears in the top right of the chart - click to revert to the full time period. See separate section on <a href="#zoom-options">Zoom options</a> below.</td></tr></tbody></table>

{% hint style="info" %}
The Relearn button is only available for:

* Those with the **Edit watches** permission
* Watches previously set to auto (not manual) thresholds
* The Today view
  {% endhint %}

#### Header

By default this will show how the Downstream threshold has been set, either Auto or Manual

If Relearn has been initiated, the start and end dates will be displayed.

#### Saved settings

The settings below will be remembered when you next log in:

* Whether the panel is collapsed or expanded
* The status of all checkboxes

### Colour coding

When viewed for today only, each section on the Details page gives an indication if it is currently alerting and thus impacting the associated heat tile colour. Find out more about [colour coding](/details/details-page-options/colour-coding.md).&#x20;

### Broadband Bandwidth description

**Vertical axis**

Adjusts according to the sync speeds recorded in the time period and shows kbps or Mbps; hover on the chart to see exact speeds

**10 Mbps**

The threshold applies to Downstream only and is shown as a horizontal purple line on the chart with the actual threshold value on the far right.\
If configured, a health alert can be sent when the sync speed drops below the threshold.

**Horizontal axis**

Adjusts according to the selected time period to show hours in day view and days in week and month views; redraws if the time zone is changed at the top right of the Details page

#### Time period

Highlight displays the lowest speed recorded for each data point in the time period:

<table data-view="cards"><thead><tr><th></th><th></th></tr></thead><tbody><tr><td>Day</td><td>Shows multiple data points per hour (the lowest speed seen for each polling period, usually three minutes)</td></tr><tr><td>Week</td><td>Shows 24 data points per day (every hour)</td></tr><tr><td>Month</td><td>Shows 6 data points per day (every 4 hours)</td></tr></tbody></table>

{% hint style="info" %}
**From week or month view:** clicking any data point jumps to the selected day view. See separate section on Zoom options below.
{% endhint %}

### Zoom options

There are two methods to zoom in on charts: drag and click. Find out more about [zoom options.](/details/details-page-options/zoom-options.md)

### Background colours

Grey backgrounds indicate non-business hours and purple backgrounds indicate maintenance periods.  Find out more about [background colours](/details/details-page-options/background-colours.md).


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