On CUCM 6.1 platform we have manager-agent relationships where
the manager has call appearances of their agent's lines. They wish to barge into the agent's cal
ls at times and listen in as the call progresses. We have the manager's and agent's phones both set up
with privacy off, builtin bridge on and single-button barge set to Barge on the manager's telephone set. Yet, when the barge is attempted from the manager's phone on an active call on the agent's phone we receive a message on the phone display that reads "No conference bridge" and the barge fails. Any ideas what is causing this?