Optelecom 9522A Installation And Operation Manual page 33

 Alarm Connections. A Form C relay output is available via Pins 14, 15, and 16 of the Secondary Data Port
connector. Refer to Figure 11.
There are three alarm conditions that will activate the external alarm contacts.
1. In the Master Fault Tolerant Mode, if the master unit does not sense the return of a transmitted data
burst on both of its optical inputs indicating a break in the optical ring.
2. RS232 Anti-Streaming Timeout is active, and the selected timeout has been exceeded, shutting down
the RS232 port.
3. Optical Anti-Streaming is enabled, and has sensed optical streaming exceeding the limits.
Note that the alarm contacts will operate on alarms from both I/O ports.
F 11
IGURE
 Connect the Fiber. Refer to the manual section on fiber cleanliness. This is important for reliable
uninterrupted modem operation.
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