Blockage Indicator Statistics At The H2Tu-R Hdsl2 Interface - ADC H2TU-C-202 User Manual

Monitoring System Activity and Performance

Blockage Indicator Statistics at the H2TU-R HDSL2 Interface

Figure 23 is an example of the BI history screen as viewed from the H2TU-C at the HDSL2 interface. These
screens can also be viewed when logged on locally at the remote unit. The BI statistics can also be retrieved using
inband or Facility Data Link (FDL) access.
BI is a quality of service (QoS) summary statistic which supplies a quick indicator of circuit performance at the
H2TU-R. The BI weighs and averages PM primitives at the H2TU-R's HDSL2 port to provide a relative index of
its performance.
BI displays as a percentage for the current hour and for each of the eight preceding hours. After viewing the
information, press R
Monitor Performance
-----------------------------------------------------------------------------
Time
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
------------------------------------------------------------------------------
Use <Space> to cycle through
Choices and <Enter> to view
ID: xxxx--xxxx--xxxx--xxxx
Figure 23. H2TU-R Blockage Indicator History Screen (HDSL2 Interface)
BI is calculated as follows:
BI = [(UAS + .4 SES +.2 ES) / MON] x 100
where: BI = 0%
BI = 99%
BI = % that
is BI < 99%
MON =
ES
SES
UAS
For information on blockage indicator statistics at the DS1 interface, see
Statistics at the H2TU-R DS1 Interface" on page
38
to return to the H2TU-C logon screen.
Event Log Config
H2TU-R HDSL2
SPAN-1
0%
0%
0%
0%
0%
0%
0%
0%
0%
Press: C(l)ear History
Interface
Statistics :
05/15/2001 01:35:13
indicates the circuit leg is clean.
indicates that the circuit leg is out of service.
indicates partial trouble in the circuit leg. This percentage is greater than
0% and less than 99%. The higher the BI percentage, the more trouble
on that particular circuit leg.
indicates the number of seconds that were monitored in obtaining the
UAS, SES, and ES data.
Count of 1-second intervals with HDSL2 CRC ≥ 1 or LOSW ≥ 1.
Count of 1-second intervals with HDSL2 CRC ≥ 50 or LOSW ≥ 1.
Unavailable Seconds or line unavailability is declared at the onset of 10
contiguous SES. For the line, including HDSL loops, to become available,
there must be a minimum period of 10 seconds which are free of SES.
October 25, 2002
Inventory Report
Blockage Indicator History
: H2TU-R HDSL2
BI History
H2TU-R
34.
LTPH-UM-1072-03
Rlogoff Help
System: OK_
"Blockage Indicator
H2TU-C-202 List 2F