A1A Locksmiths, Alarms and Security Ltd - Paradox SP4000/SP55000/MG5050 Trouble display. Your alarm system continuously monitors several troubles conditions. When a trouble condition occurs, the [TBL] key will illuminate. Press the [TBL]
Loss of Supervision - Testing and Bypassing Your Equipment | Cove Security Support
User Guide
Manual Paradox MG5000
Paradox SP5500 4 to 32-Zone Expandable Security Systems User Guide