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ES

Errored Second — any second during which one or more bit errors have been detected.

BES

Bursty Errored Seconds — a second having between 2 and 319 CRC-6 error events.

Bursty errored seconds are not counted when an SES or UAS is counted.

SES

Severely Errored Second — a second with 320 or more CRC-6 error events, or one or more OOF (Out Of Frame) events.

UAS

Unavailable Second — any second during which an Unavailable Signal State occurs.

An Unavailable Signal State condition is declared after ten consecutive SES and clears only after ten consecutive seconds which are not Severely Errored Seconds.

LOFC

Loss Of Frame Count — an accumulated value equal to the number of times that a Loss Of Frame has been declared.

Loss of frame is declared when either LOS (Loss Of Signal) or OOF (Out Of Frame) is true for two to three seconds.

LOF is cleared only after 10 seconds with LOS and OOF clear.

Performance Monitoring

Definitions

The acronyms shown on the Performance Monitoring Menu are described in Table 4-1 below

Table 4-1

Performance Monitoring Menu Acronyms

Acronym

Meaning

One Hour Network

The One Hour Network function produces screen output which lists a 24-hour summary for each of the parameters described in Table 4-1 above. Also shown are counts for each of the same alarm conditions for the preceeding hour, in four 15-minute intervals.

Figure 4-2

One Hour Network Report

ONE HOUR PERFORMANCE DATA 5-14-98 14:10:44 Site Name: Tech Pubs NCC 2020

ELEMENT ID

1, 1

Valid Intervals

96

Seconds

in

Current

Interval

464

ES

UAS

BES

SES

LOFC

0

0

0

0

0

24 Hour Total

0

0

0

0

0

Current Interval

0

0

0

0

0

Interval 1

0

0

0

0

0

Interval 2

0

0

0

0

0

Interval 3

0

0

0

0

0

Interval 4

[1,1] NEAR TAC 2010 >

4-2

Verilink NCC 2020 User Manual

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