This command causes you to part and rejoin the channel. Usually, channel modes which would make it difficult for you to return to the channel, such as +i, would be ignored when you use this command. It is the preferred method for cycling a channel on Ravenchat. To cycle the channel #rejoin, simply issue this command:
/quote cycle #rejoin
Note that your client likely has a cycle command or something similar to it. These are NOT the same commands and will behave differently. Notably, that invite only channel you parted will not let you rejoin again. This is why the server cycle command is preferred instead of any client command. It is also why quote should be used to issue the command. This ensures your client sends that command to the server, instead of simply doing a part command followed by a join command.