POTS port line test item. Options: 1. allMLTTests(1) -outdoor connection test 2. hazardousPotential(2) -hazardous potential test 3. foreignEMF(3) -foreign electromotive force(EMF) test 4. resistiveFaults(4) -resistive faults test 5. receiverOffHook(5) -receiver off-hook test 6. ringer(6) -ringer impedance test 7. nT1DcSignatureTest(7) -NT1 dc signature test 8. selfTest(8) -self test 9. dialToneMakeBreakTest(9) -dial tone make-break test 10. subscriberLine(10) -subscriber line test 11. vendorSpecificTest2(11) -vendor-specific test all results are returned in a test result message 12. vendorSpecificTest3(12) -vendor-specific test all results are returned in a test result message 13. vendorSpecificTest4(13) -vendor-specific test the test results are returned in general purpose buffer ME the ONT must deny a test operation command if bytes 39-40 do not point to a GP buffer 14. vendorSpecificTest5(14) -vendor-specific test the test results are returned in general purpose buffer ME the ONT must deny a test operation command if bytes 39-40 do not point to a GP buffer 15. vendorSpecificTest6(15) -vendor-specific test the test results are returned in general purpose buffer ME the ONT must deny a test operation command if bytes 39-40 do not point to a GP buffer 16. vendorSpecificTest7(16) -vendor-specific test the test results are returned in general purpose buffer ME the ONT must deny a test operation command if bytes 39-40 do not point to a GP buffer