No. A workstation is a physical location where one primarily does his or her work.
It does not need to have a computer or phone or even someone currently working there
to be considered as a workstation. For example, your department may have a workstation
which is currently unused because of a hiring freeze. Since someone could still be
working there, it should still be reported as a workstation.
Key to this definition is the word "primarily". A person may have a desk at which
most of their work is completed, and may also have a large table at which they periodically
sit at to sort papers, etc. Because most of the person's work is completed at the
desk, the desk is to be reported as a workstation while the large table will not.