150-359-100-01, Revision 01
Performance Monitoring
HXU-359 List 1
October 27, 2000
39
H
ISTORY
M
ENU
The History menu provides the following submenu selections:
•
24-Hour History — provides 24-hour performance history screens for
the STS-1 interface (Transport Near End and Transport Far End) and
the DS1 interfaces (Services). There are four types of error statistics
screens for the Transport Near End: VT path, STS path, line, and section.
There are three types of screens for the Transport Far End: VT Path, STS
path, and line.
•
7-Day History— provides 7-day performance history screens for the
STS-1 interface (Transport Near End and Transport Far End) and the
DS1 interfaces (Services). There are four types of error statistics screens
for the Transport Near End: VT path, STS path, line, and section. There
are three types of screens for the Transport Far End: VT Path, STS path,
and line.
•
Event Log — provides a running event log of all alarms and events with
time, date, and description.
•
Clear Event Log — use this selection to clear the Event Log.
•
Clear Perf. History — use this selection to clear Performance History
screens.
Table 14.
STS-1 Error Definitions—VT Path Layer PM
Error Type
Description
ES-V
Errored Seconds—a count of the seconds during which at least one VT path
layer BIP error was detected or an AIS-V defect was present.
SES-V
Severely Errored Seconds—a count of the seconds during which 600 or
more VT path layer BIP errors were detected or an AIS-V defect was present.
UAS-V
Unavailable Seconds—a count of the seconds during which the VT path was
considered unavailable.
CV-V
Code Violation—the count of BIP errors detected at the VT path layer (for
example, using bits 1 and 2 of the V5 byte in the incoming SONET signal). Up
to 2 BIP errors can be detected per VT superframe, with each error
incrementing the CV-V current second register.
