This operation lets the NMS discover which of the CTPs in a protection group provide non-preemptible unprotected (NUT) services.

Operation Exceptions:
1. NOT_IMPLEMENTED - Raised when the EMS is unable to support this operation.
2. INTERNAL_ERROR - Raised in case of non-specific EMS internal failure.
3. INVALID_INPUT - Raised when protectionGroupName does not reference a ProtectionGroup object.
4. ENTITY_NOT_FOUND - Raised when protectionGroupName references object which does not exist.
5. NE_COMM_LOSS - Raised when communication to managed element is lost.
