That's good, the box should be unchecked.

Now that I've read your description more closely, are you wanting to use this on an ad hoc basis? You have answered live and want to to transfer to an outside number by pressing Transfer, dialing the outside number on another line, and then pressing Complete?

If that is the case, it is not a supported feature on Basic mode.

You can pick an extension, put the outside number into one of the extension's personal speed dial slots, and forward the extension to the speed dial slot.

When you have a live call, you would press Transfer, dial the extension number of the forwarded extension, and then press Complete.