Operation and Maintenance

The following performance statistics are collected for ESF line conditions.

Statistic

What It Indicates

Errored Seconds (ES)

Any second with one or more ESF Error events.

 

 

Unavailable Seconds

Any second in which service is unavailable. Begins

(UAS)

incrementing at the onset of 10 consecutive seconds of

 

severely errored seconds (SES), and stops incrementing after

 

10 consecutive seconds of no SESs.

 

 

Severely Errored

Any second with 320 or more CRC errors or one or more

Seconds (SES)

Out Of Frame (OOF) events.

 

 

Bursty Errored

Any second with more than one, but less than 320 CRC errors.

Seconds (BES)

 

 

 

Controlled Slip

Any second with one or more controlled slips (a replication or

Seconds (CSS)

deletion of a DS1 frame by the receiving device). This is

 

collected for network performance statistics only.

 

 

Loss of Frame Count

The number of Loss of Frame conditions.

(LOFC)

 

 

 

Worst Interval

The largest number of seconds for either ES, UAS, SES, BES,

 

or CSS, or the greatest Loss of Frame Count (LOFC).

 

If more than one interval contains the same worst value, then

 

the oldest interval is displayed.

 

 

9123-A2-GB20-00

May 2000

5-37

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Paradyne 9123 manual Statistic What It Indicates, Uas, Lofc