Call context is basically the SIP channel that is visible and will be used by the agent to initiate the calls. This Tab lets you assign and unassign the call contexts to this campaign, which you have created in Call Manager.
Figure: Call Context Settings
Perform the following steps to assign call contexts to this campaign.
Figure: Assign or Unassign Call Contexts
To unassign a call context, select it in "Assigned Call Contexts" section, click icon, and click "Apply" to unassign the selected call context from the campaign.