Alarms And Events - Symmetricom SSU-2000 User Manual

Chapter 1 Product Overview
System Architecture
The Communications module communicates with the other modules in the
SSU-2000 to read configuration data, set operational parameters, and determine
what type of modules are installed. When a module is replaced, the controller loads
the correct operational parameters into the replacement module.
The Communications module provides an interface between the user and the
SSU-2000 system. This interface allows the user to display and control much of the
activity in the SSU-2000 system and within the optional SDU-2000 expansion
system. The Communications module supports three serial ports and one Ethernet
port, and allows communication over each of them independently in one of several
possible modes (ASCII, TL1, or packet).
The software in the Communications module allows for on-site reprogramming of
the flash ROM and reconfiguration of all programmable logic devices. The
Communications module also allows for this same capability for the input and clock
modules. The software on all other module types installed in the SSU-2000 system
can be updated by downloading it through the Communications module.
When the Communications module is installed, it performs an initial software
verification test to verify operation. If the module is installed in the SSU-2000 with
power already applied and with other modules installed, the Communications
module reads the configuration of the modules in the SSU-2000 and the modules in
all installed SDU-2000 expansion shelves. This information is saved in nonvolatile
memory in the Communications module. If power is applied to the SSU-2000 after
the Communications module is installed, it initializes before of any of the other
modules and provides configuration information to the individual modules.
Note: The Clock modules also store configuration information and
can download this information to the various modules if the
Communications module is removed from the shelf.

Alarms and Events

The SSU-2000 has extensive event detection, reporting, and alarm generation and
storage capabilities that permit monitoring of the system from external sites.
Alarms are conditions within the unit or at the interfaces of the unit which may
indicate abnormal operation or a change in the unit's operational status. For
example, an alarm may be generated when a parameter which exceeds a user-set
threshold. Most alarms can be assigned by the user to one of the following modes:
IGNORE, REPORT, MINOR, MAJOR, or CRITICAL.
All Alarms detected in the SSU-2000 system are reported by three methods,
including:
Display on the module LEDs
Relay contact closures on the rear panel of the SSU-2000 main shelf
Messages transmitted on all communications ports
32 SSU-2000 User's Guide 12713020-002-2 Revision F.01 – January 2007