This is a poll for Agent not receiving the logged in call "you are the only person in this conference" or robotic audio
You can see more details here: http://wiki.vicidial.org/index.php/VICI:Troubleshooting#Agent_not_receiving_the_logged_in_call_.28.22you_are_the_only_person_in_this_conference.22.29_or_robotic_audio