Digital Link DL3800 DS1, Руководство пользователя

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Front Panel Interface 5-11
5
T
EST
M
ENU
The Test Menu is used to activate network loopbacks and DTE loopbacks.
The Test Menu is only available when the unit is not in the Protected
Mode. In Protected Mode, this menu is not included in the Top Menu loop.
Tests are performed by selecting a test from the Test Menu or one of the
Test sub-menus, and pressing
ENTER . To end all tests, press the END TEST
button combination (up and down arrow simultaneously). When a test is
selected that could apply to a T1 port, the user is asked to specify to which
fraction the test should apply. Only the local unit can be tested from the
front panel. Testing the remote unit is limited to placing it in the Network
Loopback Test.
SAS In ESF only, this parameter is the count of one-second intervals containing one or
more SEF defects or one or more AIS (Alarm Indication Signal) defects.
AISS This parameter is a count of one-second intervals containing one or more AIS defects.
UAS This is a count of one-second intervals in which the DS1 path has been unavailable.
The DS1 path is determined to be unavailable from the onset of 10 continuous SESs,
or the onset of the condition leading to a failure.
CSS The Controlled Slip Second is a count of one-second intervals containing one or more
controlled slips.
OOF This is the number of seconds that the signal has been out of frame during the
accumulation period. This counter is suppressed during an LOS condition. A total of
80 OOFs in a10-second sliding window will create a major alarm, and 5 OOFs in a
600 second sliding window will create a minor alarm.
BPV This display provides the number of Bipolar Violations (BPV’s) that have occurred
during the accumulation period. A total of 15430 BPV’s in a 10-second sliding
window will create a major alarm, and 5 BPV’s in a 600 second sliding window will
create a minor alarm.
FE This display provides a count of the number of seconds containing framing bits that
have been in error during the accumulation period.
EFS Error Free Seconds for a particular T1 network port (NET N EFS). Pressing the
ENTER button when this is in the display will display the actual EFS percentage for
that network port (EFS 99.6 PERCENT).
CLR STAT NET N CLR STAT allows the user to clear all the statistic counters for that particular
network port. To clear the statistics, press the
ENTER button when NET N CLR STAT
appears in the display window.
Table 5-3 NET Statistics Items (Continued)
Parameter Definition