This callback is the preferred agent callback in which an agent can schedule a callback for another agent.
Campaign
You can create this callback for a campaign and assign the campaign to any available agent of the campaign.
Standard
You can assign this callback to any available agent whose skills match with the skills of the running job.
Strict agent
POM tries to deliver this callback to an assigned agent for maximum attempts. If all attempts are exhausted, POM assigns the callback to another agent who matches the campaign.