Nokia 6800 Series - Manual (Page 34)

6800/7000 Series - Distribution and Routing Products Installation and Operation Manual 7
Error Detection and Reporting Chapter 1: AES-6880 AES/EBU Digital Audio Distribution Amplifier Module
External Alarm
An external alarm may be connected to an FR-6800 or FR-7000 series
frame housing this and other DAs. The alarm is shared by all the DA
modules housed within the frame. If a card within the frame detects and
triggers the Contact Closure alarm, the external alarm is asserted.
Figure 1-5 below shows how a typical alarm configuration looks within a
system.
Figure 1-5. External Alarm Connections