Phase IV addresses are used when registering or modifying node
 information.  They can also be used when specifying nodes to show,
 export, or deregister.

 The format for a Phase IV address is either:

   <area>.<nodeid>
   <area>.<nodeid>+<prefix>

 Where:

   <area>   - The area number, from 1 to 63
   <nodeid> - The node id within the area, from 1 to 1023
   <prefix> - The optional Phase IV prefix

 For example:

     1.5
     1.5+39:840:

 When a Phase IV format address is specified, it is combined with the
 Phase IV prefix value to create an NSAP.  This Phase IV prefix value
 consists of the AFI, IDI, and preDSP fields of the NSAP.

 The Phase IV prefix can be specified with the Phase IV address, as
 shown above.  It can also be specified using the PHASEIV_PREFIX
 parameter.  The advantage of using the PHASEIV_PREFIX parameter is that
 the value is applied to all Phase IV addresses in the command.

 If not specified using either of the above methods, the default Phase IV
 prefix is used.  This default can be displayed or changed using the SHOW
 or SET DEFAULT commands.

 If specified for the NODE parameter, wildcards (indicated by asterisks)
 can generally be used to indicate multiple nodes, for example in the SHOW,
 DEREGISTER, and EXPORT commands.  Either the node id or the area plus node
 id can be wildcarded.  For example:

     1.*     (all nodes in area 1)
     *.*     (all nodes in all areas)