A local area network using the telephone wiring within a residence or other building simultaneously with telephony signals. The present disclosure determines the sponsor of the intercepted invoking command according to the data structure of the invoking command, and can monitor comprehensively computer system. The protection circuit includes a first transistor, a first resistive element, a second transistor, a first capacitive element, a first inverter and a protection transistor. Other markup may be translated directly into data and calls that create the scene graph objects. The methods are applicable to urine andor blood samples and can be conducted prior to the third trimester of pregnancy, and as early as the first trimester.