Make sure the Channel is ready

Info
Ignore these points if just:out and just:connect are running on another machine. Contact your system administrator if necessary.

...

Info
The figure above displays info for a just:play Channel, but the verification procedure is the same.

Connecting to a Channel via the just:control User interface

just:control is installed and configured on the appropriate client machine.
You know the name of the Channel you want to connect to.
You have the required username and password combination to connect to that Channel.