[Baertram]

Automated channel switching, based on the chat tab selected and the last incoming chat message channel is a feature of FCOChatTabBrain e.g.
You press the return key and the chat tab will change the chat channel to the last incoming chat channel so that you are able to answer directly (based on threshold values you setup for inactivity. If you are writing or doing something in chat as the message comes in you won't be interrupted.).this puts you to see incoming messages fast and makes you more performant in the chat handling.
It also is able to inform upon incoming chat messages with sounds, based on keywords or friends/guilds.
It is able to redirect messages to other chat tabs if you want to whisper e.g. and start to, it will direct the chat tab you have setup for whispering automatically.

But the addon needs you to use several chat tabs to work properly! Like 1 for system, 1 for zone/say/yell, 1 for guilds, 1 for group and 1 for instant messages/whispers.