Installation Guide - Bosch Security Systems

D9412GV4/D7412GV4 v2.03 | Installation and System Reference Guide | 7.0 Telephone Connections.Phone Line Fail LEDsTwo yellow Phone Line Status LEDs (one for theprimary telephone line, one for the secondarytelephone line) light if the telephone line is notwithin the operating range. The control panelmonitors the faulty telephone line for theprogrammed interval before indicating a troublecondition. Refer to Section 7.8 Telephone LineMonitor on page 37 for a description of phoneline monitor operation.Communication Failure LEDThe yellow Communication Failure LED lightswhen the system is in communication failure. TheLED turns off when communication restores.Refer to Section 7.10 Communication Failure onpage 38.Dedicated telephone lines might berequired for UL 864 Commercial Fireapplications. Check with yourAuthority Having Jurisdiction (AHJ).Bosch Security Systems, Inc. | 4/14 | F01U265457-05 40