Bosch D9412GV2 Operation And Installation Manual page 34

D9412GV2/D7412GV2 | Operation and Installation Guide | 7.0 Telephone Connections
Phone Line Fail LEDs
Two yellow Phone Line Status LEDs (one for the
primary telephone line, one for the secondary
telephone line) light if the telephone line is not within
the operating range. For troubleshooting information,
refer to the D9412GV2/D7412GV2 Troubleshooting
Guide (P/N: F01U011024). The control panel
monitors the faulty telephone line for the programmed
interval before indicating a trouble condition. Refer to
Section 7.8 Telephone Line Monitor on page 31 for a
description of phone line monitor operation.
Communication Failure LED
The yellow Communication Failure LED lights when
the system is in communication failure. The LED turns
off when communication restores. Refer to Section
7.10 Communication Failure on page 31.
Dedicated telephone lines might be
required for UL 864 Commercial Fire
applications. Check with your Authority
Having Jurisdiction (AHJ).
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