I would like to disable the second line on our agents' phones. I do not want the call queue to go to an agent who is already on the phone. At the moment, the calls will still ring when an agent is on a call.
If you have call queues setup the call will not go to a person on a call it goes to the open extensions. There is actually a thread asking to have call waiting turned on for call queues. If you are using a ring group and not a call queue there is a thread here to vote on disabling call waiting on extensions.