Cloneable
Select the Cloneable check box to permit a new persistent channel to be created automatically if all current channels with the same base name are full.

A cloneable channel is a persistent channel that replicates itself when its member limit is reached. For example, suppose the cloneable channel #TestChan has a member limit of 10. The eleventh user who tries to join #TestChan is placed in a new channel called #TestChan1. The twenty-first user is placed in #TestChan2, and so on. Each clone retains the properties of the original (base) channel.

Cloneable channels are useful for maintaining separate discussion groups on the same subject. You can keep the groups manageable by setting the base channel's member limit to a relatively low number, such as 10 or 20.