150-357-200-02, Issue 2
Overview
HXU-357 List 1
February 9, 1999
9
Microprocessor
The microprocessor reads and writes data to the bidirectional data bus using
a system clock of 40 MHz divided down to 20 MHz.
The microprocessor performs arithmetic and logic operations as directed and
monitors various alarm point functions throughout the multiplexer. These
tasks include:
•
illuminating appropriate fault and status indicators on the circuit card.
•
using lockout software to isolate a fault condition to a specific card,
thereby suppressing down-line faults due to sympathetic alarm
conditions.
•
performing automatic switching from the defective multiplexer card to
the standby card.
•
calculating DS3 BER for the online and offline cards.
•
calculating the bipolar violation (BPV) errored-seconds performance for
each DS1 low-speed input and DS3 channel inputs.
•
providing remote alarm reporting, external to the multiplexer, using relay
contact closures to indicate major, minor, critical, abnormal and far-end
alarm conditions.
Microprocessor System Software
The microprocessor system software supports the following operational,
administrative, maintenance and provisioning features:
•
performance management: retrieves and schedules all performance
management parameters, thresholds and histories.
•
configuration management: enters, edits, deletes, and retrieves
provisionable parameters.
•
fault management: clears and views current alarms, views 100-event
alarm history log.
•
system administration: logs in, initializes, edits password, and manages
user names.
