Use the PURGE CIRCUIT command to remove circuit parameters from the
 permanent database on the local node or DTE.  See the description of the
 CLEAR CIRCUIT command for a description of the parameters which may
 be removed.

 PURGE   KNOWN CIRCUITS        (parameters...)
         CIRCUIT circuit-id

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

1  –  KNOWN CIRCUITS

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

2  –  CIRCUIT circuit-id

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

3  –  Examples

      NCP>PURGE CIRCUIT DMC-0 ALL

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