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Field Name
Description
defects, SEF (Severely Errored Frame) defects, or LPR (Loss of Power) defects. [4]
Total UAS
Total number of Un-Aavailable Seconds.
This is a count of 1-second intervals for which the xDSL line is unavailable. The xDSL line becomes
unavailable at the onset of 10 contiguous SESs (included in the unavailable time).
Once unavailable, the xDSL line becomes available at the onset of 10 contiguous seconds with no SESs
(excluded from unavailable time). [4]
References
[1]
ITU-T Recommendation G.992.1 (1999), Asymmetric digital subscriber line (ADSL) transceivers
[2]
ITU-T Recommendation G.992.3 (2005), Asymmetric digital subscriber line transceivers 2 (ADSL2)
[3]
ITU-T Recommendation G.997.1 (2006), Physical layer management for digital subscriber line (DSL) transceivers
[4]
ITU-T Recommendation I.432.1 (1999), B-ISDN user-network interface – Physical layer specification: General characteristics
Running xDSL (BER) tests
1. Scroll to the bottom of the page and click
xDSL BER Test
. The ADSL BER Test dialog box appears.
2. In the
Tested Time
field, select the duration in seconds and click
Start
. Options range from
1 second
to
360 seconds
.
The test transfers idle cells containing a known pattern and compares the received data with this known pattern. Com-
parison errors are tabulated and displayed. To stop the test, click
Stop
.
