Front Dual System Processor Timing Module 3
Plexus 9000 Planning and Engineering Guide
Issue 1, April 23, 2004
Section 130-120-220
5-60
Telica,
Inc.
Fault Alarm Manager (FAM)
The FAM is responsible for processing all system events that range from
informational to critical. For the most part the fault manager simply logs
events and reports alarms. In some cases corrective action is issued to
other parts of the system based on alarm policy configurations. The FAM
runs on both the working and protection SP3s but on the protection SP3, it
takes more of a passive role because it does not need to handle errors from
equipment.
The FAM determines the active module when booting with two SP3s and
communicates the SP3 redundancy state. It is responsible for launching
processes during the boot sequence and ensures that files on the disk are
adequate for operation.
Heartbeat
The Heartbeat process is a simple message exchange protocol, which will
run between System Processors over a communications link to verify that
each SP3 is operating
Equipment Manager (EQM)
The EQM keeps track of state information for all IOMs, equipment
holders in the chassis and various links that comprise an IOM. It provides
the capability to configure equipment that is not present in the system. It
provides an interface to perform SP failover; the Fault Manager makes the
decision, the EQM does the hardware manipulation and sequencing.
TL1 Agent
The TL1 Agent processes TL1 commands and dispatches requests for
management information, or changes of configuration information to the
appropriate system resource for processing over an RS-232 or an Ethernet-
based connection. The RS-232 connection is through a serial craft port,
which is any VT-100 compatible terminal device. Input data streams from
the serial craft port are buffered until a TL1 command terminator (;) is
found or an error occurs. If a TL1 command terminator is found, the
command is passed to the TL1 agent for processing. Ethernet-based
communication is direct with the TL1 agent. The remote end of the
Ethernet connection can be either a craft port using Telnet or the EMS.
The TL1 agent supports the transmission of autonomous output messages.
Autonomous messages are unsolicited messages sent by the Plexus 9000
to indicate the occurrence of an alarm or some other significant event.
The TL1 agent detects the condition by either polling the operational code
or by some asynchronous notification.
The TL1 agent supports the ability to log TL1 command/ response
messages and autonomous messages. Command/ Response messages are
stored in one log and autonomous messages are kept in a separate log.
