D-Link DFE-690TXD User Manual page 22

C. Type a unique, identifying name for this particular computer
in the "Computer name:" box. This will be the name that other
computers on your network will use to communicate with this
computer. Each computer's name must be unique on a particular
network or confusion will result. (The computer's name should be 15
or fewer characters with no spaces.)
D. Type the workgroup name this computer will be a part of in
the "Workgroup:" box. All of the computers on your network should
have an identical Workgroup name.
E. The "Computer Description:" box is optional. You may enter
a description that will help you identify this computer on your
network. Then click "Close."
F. Repeat this process for each computer on your network to
ensure that they all have a unique "Computer Name" and identical
"Workgroup."
19