Paradyne 7112 User Manual download pdf (Page 55)

Monitoring the DSU/CSU

6-13

7112-A2-GB20-20

March 1998

 Bursty Errored Seconds (BES) –The number of bursty errored seconds for

the current interval. A bursty errored second is any second with more than

one, but less than 320, CRC errors. The maximum is 900 seconds.

 Controlled Slip Seconds (CSS) – The number of controlled slip seconds for

the current interval.

 Loss of Frame Count (LOFC) – The loss of frame count for the current

interval. This is a count of the number of times that an LOF is declared. The

maximum count is 255.

A Telco set and a user set are kept for each of the above statistics. The user set

is a copy of the Telco set, but the user set can be cleared.

In addition to the statistics kept for the network interface, the system maintains a

Status register for each interval (far-right column). The Status register shows

whether or not the following events have occurred at least once within the

15-minute interval:

 Y – Yellow Alarm

 L – Loss of Signal

 E – Excessive Error Rate

 F – Frame Synchronization Bit Error

 V – Line Code Violation

 none

Every 15 minutes, the current interval’s data is rolled over into a set of

accumulator registers that represent the previous 96 15-minute intervals for the

counters.

When you enter the Network Performance Statistics screen, the current interval

and seven most recent intervals are displayed. To display other intervals:

 Use the PgUp and PgDn selections. Intervals display as a series of

7 consecutive periods (recent to old).

 Tab to one of the rows in the interval table that has an underlined interval

number (intervals 1, 4, and 7 when first displayed). Type the number of the

interval you want to display at any of these three underlined locations.

Intervals are numbered from 1 (most recent) to 96 (oldest). For example:

— Enter 10 on the top line to display intervals 10 through 17.

— Enter 10 on the middle line to display intervals 7 through 13.

— Enter 10 on the bottom line to display intervals 4 through 10.

Worst Interval

To assist you in selecting trouble spots, a Worst Interval is also displayed. The

Worst Interval is the 15-minute period that contains 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.

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Paradyne 7112 User Manual Page 55

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