Bay Networks Manager, Руководство пользователя

Страница: 325 / 488

am.book : ch20 33 Tue May 6 13:24:47 1997
20-33
Chapter 20 Displaying Status Information
Annex Manager User Guide
Part 4 Control and Status Commands
•
Uptime
indicates the amount of time (in hours, minutes, and
seconds) that the T1 engine has been up. The hours field can
count up to 2,700 days, more than 7 years.
•
Unit ID
identifies the T1 engine, using its firmware number,
firmware revision number, firmware release date, and EPROM
check sum.
•
Serial Number
displays the number of the engine.
•
Circuit ID
displays the circuit identification number of the
engine.
Understanding the Interval Information Box
The
Interval Information
box provides T1 engine statistics in the following
categories:
•
Interval Number
lists each 15 minute interval for which statistics
appear in this box. This column displays a number from 1 to 96,
Current
, or
Total
.
•
Out of Frame Errors
lists the number of Out of Frame (OOF)
events that occurred. An OOF event begins when the network
interface sends two of four incorrect consecutive frame
synchronizing bits, and ends when reframe occurs.
•
BiPolar Violations
lists the number of BiPolar Violation (BPV)
errors. For AMI-coded signals, a BPV event occurs when there
are two consecutive pulses of the same polarity. For B8ZS-
coded signals, a BPV event occurs when there are two
consecutive pulses of the same polarity that are not part of the
zero substitution code.
•
CRC Errors
lists the number of CRC errors. A CRC error occurs
when the CRC field calculated by the installation, based on the
incoming DS1 signal, does not agree with the CRC field
contained in the DS1 signal received from the network.
•
Controlled Slip
lists the number of times the T1 engine replicates
or deletes a DS1 frame.