Use the PURGE LINE command to remove line parameters from the permanent
 database on the local node or DTE.  See the description of CLEAR LINE for
 a list of the parameters which may be specified.

 PURGE   KNOWN LINES     (parameters...)
         LINE line-id

 All underscores found in parameters must be replaced with spaces
 when parameters are used in NCP commands.

1  –  KNOWN LINES

 Indicates that the parameters for all known lines are to be
 removed from the database.

2  –  LINE line-id

 Identifies the line whose parameters are to be removed from
 the database.

3  –  NETWORK

 This parameter removes the NETWORK parameter from the permanent
 database. Applies only to X25 lines.

4  –  Examples

      NCP>PURGE LINE DMC-0 ALL

          This command removes all parameter entries for line DMC-0  in
          the  permanent database.