Req. 1.3.0 Test 1a GBM Interrupt Test 1b Test 1c Req. 1.0 1553 Receive Service 1553 Transmit Service Req. 1.0.0 Req. 1.0.1.0 Req. 1.0.1 Req. 1.0.1.1.1 Req. 1.0.1.1.2