Blockage Indicator Statistics At The H2Tu-R Ds1 Interface - ADC HiGain H2TU-C-202 User Manual

Monitoring System Activity and Performance

Blockage Indicator Statistics at the H2TU-R DS1 Interface

Figure 18 is an example of an H2TU-R Blockage Indicator (BI) History screen as viewed from the line unit
following a remote log on. This screen 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 access.
BI is a quality of service (QoS) summary statistic which provides a quick indicator of circuit performance at the
H2TU-R. The BI weighs and averages PM primitives to give a relative index of performance for leg 1 (NET TX)
and leg 3 (CPE TX) of the DS1 interface (see
This screen displays the BI as a percentage for the current hour and for each of the eight preceding hours.
Monitor Performance
------------------------------------------------------------------------------
Time
4:00
5:00
6:00
7:00
8:00
9:00
10:00
11:00
12:00
------------------------------------------------------------------------------
Press <Space> to cycle through
choices and <Enter> to view
ID: xxxx--xxxx--xxxx--xxxx
BI is calculated as follows:
BI = [(UAS + .4 SES+.2 ES) / MON] x 100
where: BI = 0%
Type R to return to the H2TU-C logon screen.
32
Figure 11 on page
Event Log Config
Blockage Indicator History
NET-TX CPE-TX
0% 0%
0% 0%
0% 0%
0% 0%
0% 0%
0% 0%
0% 0%
0% 0%
0% 0%
Interface
Statistics :
02/15/00 12:30:01
Figure 18. H2TU-R Blockage Indicator History Screen
indicates the circuit leg is clean.
BI = 99% indicates that the circuit leg is out of service.
BI = % that is indicates partial trouble in the circuit leg. This percentage is
BI < 99% greater than 0% and less than 99%. The higher the BI
percentage, the more trouble on that particular circuit leg.
MON = the number of seconds that were monitored in obtaining the
UAS, SES, and ES data.
ES Errored Seconds are a combination of DS1 path and line
parameters as defined in ANSI T1.231-1997.
SES Severely Errored Seconds are based on parameters similar
to ES, but are more severe in number.
UAS Unavailable Seconds. Upon the onset of 10 contiguous
SES, line unavailability is declared. For the line (including
HDSL loops) to become available, there must be a
minimum period of 10 seconds which are free of SES.
March 14, 2000
25).
Inventory Rlogon Help
: H2TU-R DS1
BI History___
H2TU-R
152-202-116-02, Issue 2
System: OK___
H2TU-C-202 List 1F