Alcatel-Lucent 1643 AMS User's Operation Manual page 613

Performance monitoring
Threshold
BBE
UAS
SHDSL performance monitoring
The performance of SHDSL segments that are terminated on the LTU, SRU and NTU
can be monitored. The SHDSL standard (ITU-T Rec. G.991.2) prescribes a set of
parameters that needs to be monitored and stored in 15 minute and 24 hour bins for
near-end Performance Monitoring. The following table provides an overview of the PM
parameters:
Parameter
CV/BBE
ES
SES
LOSWS
UAS/US
OFS/AIS
CRC6
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365-312-807R7.2
Issue 4, May 2007
Termination
VC-12, VC-11
VC-4
MS-1
P12
VC-12
VC-4
MS-1
P12
Name
Code Violation/background
Block Error
Errored Seconds
Severely Errored Second
Loss of SyncWord Second
Unavailable Second
OOF or AIS Second
CRC6 anomaly
Alcatel-Lucent - Proprietary
See notice on first page
15 Minutes
1,799,100
7,199,100
172,799,100
899100
900
900
900
900
Definition
Each CRC6 anomaly is counted a
CV/BBE during non-SES and
non-UAS seconds
Each second with one or more CRC6
anomaly is counted as an ES, unless
that second is UAS
Each second with 50 or more CRC6
anomalies (> 30%)or one or more
LOSW events is counted as an SES,
unless that second is UAS
Each second in which LOSW is
declared as LOSWS
Each second that is part of
unavailable time (UAT) is counted as
UAS. UAT is declared at the begin of
10 consecutive SES and cleared at the
begin of ten consecutive non-SES.
Second containing ab LOSW or AIS
event
Number of CRC6 block errors (same
as BBE, but not inhibited by SES or
UAS)
Available PM data
24 Hours
172713600
691113600
16588713600
86313600
86400
86400
86400
86400
10-31