This DisplayString object names a numeric-list object representing the full set of source ports this General Access List rule matches, allowing a group of ports rather than a single range to be referenced. The desc specifies that for the rule to be operational there must be a matching entry in csOrionNumericListTable whose csOrionNumericListName equals this value. For example, an administrator could define a numeric-list called 'voip-src-ports' covering several UDP ports used by a VoIP client and reference it here instead of writing one GAL rule per port.