Specifies the global default value of the size of the hole in the port list (usually 1 for US, 2 for Europe) that occurs at LivingstonOffs. This optional parameter is only used if you are using Simultaneous-Use with a NasType of Livingston in one of your Client clauses. Defaults to 2. This value can be overridden on a per-Client basis by using LivingstonHole in a Client clause. For more information, see Section 3.14.44. LivingstonHole.