A textual description of the group. This value
should include the full name and version
identification of the group's hardware type and
indicate how the group is differentiated from other
types of groups in the repeater. 'Plug-in Module,
Rev A' or 'Barney Rubble 100BaseVG 4-port socket
Version 2.1' are examples of valid group
descriptions.
It is mandatory that this only contain printable
ASCII characters.