This chart shows the signal strength (the RSSI values recorded) for the cellular line over time. It also shows changes in cell tower ID, network and radio technology. The chart is only available for lines which have been set up as Cellular Clarity by an admin user.
- For day view only, download the information to a CSV file (see sample CSV image below).
- Vertical axis
- Shows fixed values from -30 dBm to -120 dBm. "Excellent" values are green and near -30 whilst poor values show in red and are closer to -120. Hover on the chart to see exact values. Note: any values outside this range typically indicate no reading so these are mapped to -120.
- -90 dBm
- The threshold 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 signal strength 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.
Note: When signal strength is lost, Highlight shows this as a red blip at -120 dBm. Whilst there is no signal strength, there is also no information on cell tower ID, network or radio technology so Highlight registers these values as 0 or null. Changes to null values are not shown as blips - only changes to genuine values are shown.
- Shows blips for changes in the cell tower ID
Cradlepoint: Tower changes are not reported in Highlight as the data is not provided by the device
- Shows blips for changes in the network - for example Vodafone to O2
- Shows blips for changes in the radio technology - for example LTE to Wcdma
Highlight displays the average recorded value for each signal strength data point in the time period:
- Shows multiple data points per hour (one for each polling period, usually five minutes)
- Shows 24 data points per day (every hour), Average for each hour is shown along with Min/Max values if selected
- Shows 6 data points per day (every 4 hours), Average for each period is shown along with Min/Max values if selected
From week or month view: clicking any data point jumps to the selected day view. See GIF in separate section on Zoom options below.
There are two methods to zoom in on charts: drag and click. All new style charts on the details page are synchronised so they zoom in and out together or the whole page jumps to a date on click.
Grey/White backgrounds - Business hours
The chart shows non-business hours with a grey background and business hours with a white background on day and week views. Business hours are not shown on a month view.
Business hours are the time periods (to the nearest hour) that a business is operational. Highlight uses business hours when displaying charts on the Details page, filtering reporting results and generating alerts. Default values are 06:00 to 18:00 Monday through Friday with Saturday and Sunday excluded. However, you may see different settings if the business hours on a parent folder or location have been changed. Business hours reflect the local time zone for the location.
Find out more about business hours.
Purple backgrounds - Maintenance
Any purple background areas on the chart show current and past maintenance periods. Watches in maintenance do not send alerts, change the colour of heat tiles or decrement the availability figure for the time period.
Find out more about maintenance indicators on the details page.