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LTPH-UM-1253-01
Table 9. Error Acronyms Used on the DS1 Performance History Screens
Error
Description
Acronym
CV-L
Code Violation - Line
Total BPV count.
ES-L
Errored Seconds - Line
Seconds with BPV ≥ 1.
SES-L
Severely Errored Seconds - Line
Seconds with BPV plus EXZ ≥ 1544 or
LOS ≥ 1.
UAS-L
Unavailable Seconds - Line
Seconds with LOS ≥ 1.
PDVS-L
Pulse Density Violation Seconds - Line
Seconds with excessive zeros
(AMI = 16 zeros, B8ZS = 8 zeros).
ES-P
Errored Seconds - Path
Seconds with SEF
FE (SF) ≥ 1.
(a) Line (L) refers to the AMI DS1 line used to transport the payload.
(b) FE is a frame bit error.
(c) Appears on H4TU-R Performance History screens.
(d) Appears on the DS1 Current Statistics screens.
(e) Path (P) refers to the total framed payload being transported between two points.
(f) Severely Errored Frame–Two or more frame bit errors occurring in a 0.75 ms interval for SF or a 3 ms interval for ESF.
Performance History at the HDSL4 Interface
The HDSL4 interface has 31-day, 48-hour, 25-hour, and current statistic screens for the H4TU-C.
Figure 18 on page 28
on page 29
are examples of 25-hour and current statistics performance history screens. Refer to
page 30
for descriptions of the kinds of errors reported on all HDSL4 performance screens. Asterisks indicate
performance monitoring from the previous day.
H4TU-C-231 List 5A
(a)
(e)
(f)
, CRC (ESF), or
are examples of 31-day and 48-hour performance history screens.
October 15, 2003
Monitoring System Activity and Performance
Error
Description
Acronym
SES-P
Severely Errored Seconds - Path
Seconds with SES, CRC (ESF) ≥ 320, or
(SF) ≥ 8 (F
(b)
FE
UAS-P
Unavailable Seconds - Path
A second of unavailability based on SES-P or
AIS ≥ 1.
(c)
PRM-NE
Performance Report Monitoring - Near End
The PRM registers in the ESF/FDL from CPE
indicate errors, and the signal received from the
network at the remote is error-free.
(c)
PRM-FE
Performance Report Monitoring - Far End
The PRM registers in the ESF/FDL from the network
indicate errors, and the signal received from the
CPE is error-free.
(d)
B8ZSS
B8ZS Monitored Seconds
Seconds with B8ZS detection when AMI option is
active.
(d)
MSEC
Monitored Seconds of the current
(15-minute/1-hour/1-day) screen.
+ F
).
T
S
Figure 17
Figure 19
and
Figure 20
Table 10 on
and
27
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