Specifications
8-22
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 8 Performance Monitoring
Performance Monitoring for Electrical Cards
DS1 Tx SES-P
Transmit Path Severely Errored Seconds (Tx SES-P) is a count of the
seconds containing more than a particular quantity of anomalies and/or
defects for paths on the transmit end of the signal. For the DS1-ESF paths,
this parameter is a count of seconds when 320 or more CRC-6 errors or
one or more SEF or AIS defects occurred. For DS1-SF paths, an SES is a
second containing either the occurrence of four FEs or one or more SEF
or AIS defects.
DS1 Tx UAS-P
Transmit Path Unavailable Seconds (Tx UAS-P) is a count of one-second
intervals when the DS1 path is unavailable on the transmit end of the
signal. The DS1 path is unavailable when ten consecutive SESs occur.
The ten SESs are included in unavailable time. Once unavailable, the DS1
path becomes available when ten consecutive seconds occur with no
SESs. The ten seconds with no SESs are excluded from unavailable time.
Table 8-13 VT Path PMs for the DS1 and DS1N Cards
Parameter Definition
CV-V
Code Violation VT Layer (CV-V) is a count of the BIP errors detected at
the VT path layer. Up to two BIP errors can be detected per VT
superframe, with each error incrementing the current CV-V second
register.
ES-V
Errored Seconds VT Layer (ES-V) is a count of the seconds when at least
one VT Path BIP error was detected. An AIS-V defect (or a lower-layer,
traffic-related, near-end defect) or an LOP-V defect can also cause an
ES-V.
SES-V
Severely Errored Seconds VT Layer (SES-V) is a count of seconds when
K (600) or more VT Path BIP errors were detected. SES-V can also be
caused by an AIS-V defect (or a lower-layer, traffic-related, near-end
defect) or an LOP-V defect.
UAS-V
Unavailable Second VT Layer (UAS-V) is a count of the seconds when
the VT path was unavailable. A VT path becomes unavailable when ten
consecutive seconds occur that qualify as SES-Vs, and it continues to be
unavailable until ten consecutive seconds occur that do not qualify as
SES-Vs.
Table 8-12 DS1 Transmit Path PMs for the DS1 and DS1N Cards (continued)
Parameter Definition