Patton electronics 3095, Administrator'S Reference Manual

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mDSL Port Information window 79
mDSL DACS Administrators’ Reference Guide 9 • mDSL Port Configuration
Figure 22. History of Near End Performance window
The history page collects and records the error history of the port. Interval 1 is the history of the most recent,
completed 15-minute interval. The length of each interval is 15 minutes. and records how many ES, SES, and
UAS have occurred in the 15 minute intervals. The maximum number of intervals is 96 which is one 24-hour
time period. (15 minutes x 96 = 24 hours). The history page always records the last 24 hours error performance
of the port. Information older than 24 hours will not be shown and will be erased.
mDSL Port x (mdslIntervalIndex)
In this example of “mDSL Port x” the number of the port may range from 1 to 16. This number is the index
value which identifies the referred mDSL modem port.
Interval (mdslIntervalNumber)
This refers to a completed 15 minute interval. This number may range from 1 to 96, where 1 is the most
recently completed 15 minute interval and 96 is the least recently completed 15 minute interval. The maxi-
mum of 96 intervals equals the historical data for the last 24 hours of operation.
Errored Seconds (ES) (historyESMdsl)
Indicates the number of errored seconds. An errored second occurs when either (1) the CRC does not match
the calculated CRC or (2) when the line is linked up but lacking synchronization. Whether 1 error or up to
159 errors occur within a second, it will still be 1 errored second.
Severely Errored Seconds (SES) (historySESMdsl)
Indicates the number of severely errored seconds. A severely errored second is defined for one mDSL line as a
second containing more than 160 CRC errors. The SES counter will not be incremented when the box is
incrementing the Unavailable Seconds count.
Unavailable Seconds (UAS) (historyUASMdsl)
Displays the number of seconds that the modem line was unavailable. Unavailable seconds is an indication of
the amount of time that an mDSL port is activated but not available for data transmission. The UAS counter is
incremented under the following criteria.
• The port must be activated.
• Once the port is activated and a link-up timer has expired, the UAS counter will be incremented if the ports
loses sync or does not enter synchronization with the far end of the link.
• Once the port gains link status, the 3095 begins looking for ES and SES.