41309401TH Rev.4 189 /1 : L O C A L T E S TY E S ( ← ) N O ( → / 1 - 5 )1 : S E L F D I A G N O S I SY E S ( ← ) N O ( → / 1 - 8 )← key← key1-8123→ key or 1-5→ keyTechnical ProgrammingSelf Diagnosis← keyLT-9 LT-1LT-345LT-5Sensor CalibrationLED TestTone Send TestModem Send TestModem Receive TestMF (Tone) Send TestTone (Tel/Fax) TestLT-92 : S E N S O R C A L I B R A T I O NY E S ( ← ) N O ( → / 1 - 8 )1-8LT-9→ key← key3 : L E D T E S TY E S ( ← ) N O ( → / 1 - 8 )1-8LT-97LT-7→ key← key7 : M F ( T O N E ) S E N D T E S TY E S ( ← ) N O ( → / 1 - 8 )1-8LT-98LT-8→ key← key8 : T O N E ( T E L / F A X ) T E S TY E S ( ← ) N O ( → / 1 - 8 )1-8LT-9→ key← key4 : T O N E S E N D T E S TY E S ( ← ) N O ( → / 1 - 8 )1-8LT-9→ key← key5 : M O D E M S E N D T E S TY E S ( ← ) N O ( → / 1 - 8 )1-8LT-96LT-6→ key← key6 : M O D E M R E C E I V E T E S TY E S ( ← ) N O ( → / 1 - 8 )1-8LT-96.5 Local Test6.5.1 When G4 option board is not installed.