How to use the “Usage statistics – SIP trunk group” page?

Whether your business subscribes to a SIP Trunk Group service or you access the public telephone network through your subscription to a Virtuoso service, use this page to explore usage statistics for the SIP trunk groups reserved for your use.


SIP Trunk (group): A SIP trunk group is a collection of VoIP telephone lines that business telephone systems can use to receive and place calls.

Main outgoing () and incoming (DID) numbers: A SIP trunk group will have a main number to which outgoing calls are all associated. To this number, which can also receive incoming calls, there can be associated an almost unlimited number of incoming telephone numbers. Often, these are called “DID” numbers, which means “Direct Inward Dailed” numbers. Most of the time, these numbers are routed by your telephone system to internal extensions or call center lines.

Line group capacity: Depending on the package you are subscribed to, the SIP trunk group may allow a maximum number of simultaneous calls. This  maximum value applies to the total inbound and outbound call active at any one time.

Understand the different sections of the page:


This section allows you to choose the period for which the statistics will be displayed.

Graphical summary of usage per hour

This section presents in graphic form the occupation of the lines of the group. The vertical scale (Y axis) is set to the maximum simultaneous call capacity of the trunk group. The maximum capacity of the group in question is shown in the subtitle of this graphic.

The horizontal axis (X) shows for each day of the period the maximum number of simultaneous calls reached during that day.

Three peaks of occupancy are shown, in red the incoming calls, in blue the outgoing calls and in purple the total of both when considering the overlap of the incoming and outgoing calls. The latter illustrates the maximum actual occupation of the lines in the trunk group.

The dates in yellow are Saturday and Sunday. This color is added for ease of  reading.

Maximum number of calls per hour by date

This table shows the data that is used to produce the above graph.

Number of incoming calls by associated telephone number (DID)

This table shows the number of incoming calls handled during the period, grouped by telephone number dialed (see DID above).

If you have subscribed to a Virtuoso telephone system service, do not confuse these statistics with those produced by that system. These statistics are associated with the telephone lines and therefore encompass several processing situations that will not be visible when consulting the statistics of your Virtuoso system.

Here is what the different columns represent:

Dialed number: This is the called number (often called “DID”)

Total: total of the following columns

Completed: calls answered by the telephone system and completed without error.

Busy: Calls for which the telephone system refused to answer because its capacity did not allow it to handle them. Warning: this is not associated with a lack of number of lines in the trunk group.

Abandoned: calls where the caller abandoned the call before the phone system could accept it.

Timed out: calls for which the request to connect made to the telephone system has not been answered within the standard time limits to establish a connection.

Lost: calls for which an error code is recorded during the call and the connection is lost. All causes resulting in a lost call are included in this figure.

Others: all other calls that have not been classified in the other columns.

Duration: Number of hours representing the total of the completed and lost incoming call minutes during the period.