Maintenance
150-231-175-01, Revision 01
28
September 23, 1998
HLU-231 List 7E
P
ERFORMANCE
D
ATA
S
CREENS
The Performance Data screens show the Errored (ES) and Unavailable Seconds (UAS) for both HDSL loops and
each T1 input at 15-minute intervals over a 4-hour time interval. Earlier and later data, in 4-hour time periods on
different span screens, can be accessed by pressing
(Previous) or
(Next) respectively. All Performance Data
counters can be set to zero by pressing
(Clear) from the HLU-231 Span Status screen shown below.
Errored and Unavailable seconds are defined in
.
From each Performance Data screen you can do the following:
•
Press
to view the previous 4-hour data screen.
•
Press
to view the next 4-hour data screen.
•
Press to exit.
•
Press
to view the next available span.
Since the HLU-231 is considered the master module, this clears
all performance data screens at
both the HLU-231 and the HRU. The RS-232 interface at the HRU does not allow the counters to
be cleared.
Table 10.
Errored and Unavailable Seconds Definitions
ES and UAS
Definition
HDSL Errored Second
A second in which at least one HDSL CRC has occurred.
HDSL Unavailable Second
A second in which an HDSL loop has sync loss at least once.
DS1 Errored Second
A second in which at least one BPV has occurred.
DS1 Unavailable Second
A second in which at least one T1 LOS condition (175 ± 75) zeros has occurred.
