+=item cdrtypename
+
+Returns the name of the CDR type (see L<FS::cdr_type) associated with this
+rate, if there is one. If not, returns the cdrtypenum itself. This will
+only return an empty string if cdrtypenum is NULL.
+
+=cut
+
+sub cdrtypename {
+ my $self = shift;
+ my $cdrtypenum = $self->cdrtypenum or return '';
+ my $cdr_type = qsearchs('cdr_type', { cdrtypenum => $cdrtypenum });
+ return $cdr_type ? $cdr_type->cdrtypename : $cdrtypenum;
+}