OK one will work and one will not.
Calling out from express talk....
You will need to configure speed dial numbers in skype for each id (name) you want to dial.
Now when you dial the Skype line (6 is the default) then the speed dial number you setup and thats it.
Dial in:
This is an issue as so far as i know skype and the uplink does not transfer the dmft tones from skype to the uplink.
You can how ever have that line go directly to a operator and then transfer a call intenally or to a voive mail box.
Hope this helps