Hello, I have a cluster of ISS mcd5.0 running using sip lines. When a supervisor wishes to listen into the agent they enter the code and start monitoring the call. If the agent then puts the internal call on hold and then dials out to an external number the monitoring supervisor stays with the internal call. If they clear down the monitor and launch it again they get silence until the agent returns to the internal call. Has anyone come across this and have any ideas? I have been looking into COS options for both the users and trunks but haven't hit on a winning combination yet.