Telephone line supervised trouble: EST3 Trouble Code | Fire Alarm Resource Center
Telephone line supervised trouble
trouble
Edwards EST EST3
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What This Code Means
The DACT has detected a fault on the supervised telephone lines.
Common Causes
1Single open line
2Wire-to-wire short
3Ground fault on telephone line
Resolution Steps
Verify the connection to the telephone service provider. Check for physical damage to the phone lines or shorts in the wiring between the panel and the RJ31X jack.
