How does the phone line monitor for the DS7100 operate?
If the monitor detects a phone line fault for more than 50 seconds, the power LED will begin to flash. If the audible output has been enabled in line 89, the keypad sounder will pulse every ten seconds if the control is disarmed. If the panel is armed, the siren output will activate.
To ascertain if the trouble condition is indeed a phone line failure, enter # 87 at the keypad. The display will indicate "Communication Failure".
If the "System Trouble Report" (line 51) is programmed the system will try to send this report.
A phone line failure may be caused by:
A cut or missing phone line.
A reversed connection (Tip, and Ring Reversed)
A miswired jack
To clear the error;
Determine the cause of the failure and eliminate the cause.
After eliminating the cause of the failure, wait at least ten seconds.
The error will clear if the problem has been eliminated and the LED will stop flashing provided a failure has not occurred on the central station phone numbers. If a failure has occurred at the central station restore by entering # 87 * at the keypad.