derivedDataType SipErrorCodeDT

EcimDerivedString with length (0..3) constraint and pattern restriction |([3456][0-9][0-9]). Possible values:
<empty> - SIP response error code is not modified
300..699 - SIP error code is replaced with the provided value

References from:
CscfSipErrorConfigurationEntryClass;
stringSipErrorCodeDT [ 0..3 ]
Valid values: (^$|([3456][0-9][0-9]))
  derivedDataType SipErrorCodeDT