yes, shortened commands are allowed.
as for the second posting, how are the routers configured. is it a DCE DTE connection? What is the status of the interface? IS it interface is down line protocol is down, or interface is up line protocol is down? If it says that the line protocol is down and the connection is a DTE DCE , it must be the clock rate which is not specified. OR any type of datalink layer problem like keep alives and etc. Can you post the full running config so we can examine it further?