Mike,
I'm on version 10, but it should work the same way. I put in a new extension, with Type 8411D, and tried to give it an Analog port number and it returned an error: Object type and port type inconsistent.
You should be careful as to not plug a digital phone into an analog outlet as it can severely damage your hardware. As I understand, any station types that end in "D" are for Digital phones.
As far as your extensions, as I understand you can not have extension numbers themselves designated as either Analog or Digital, you determine that when you give the extension it's hardware type. Analog stations typically have 2500 as their station type, and you should not attempt to plug that 8411D phone into any analog ports.
I hope this information is helpful to you. Good Luck.