363-206-295
Maintenance Description
Issue 1 December 1997 9-37
Errored Seconds (ES) 9
An "errored second" is a second in which one or more B3 parity violations are
detected. Seconds that are UAS are not counted as ES. An ES "type A" is a
second in which exactly one B3 parity violation is detected. An ES "type B" is a
second in which more than one and less than nine B3 parity violations are
detected. All three of these parameters are counted and thresholded
independently for each STS-1 path terminated by the system.
Severely Errored Seconds (SES) 9
A SES is a second in which nine or more B3 parity violations are detected. SES
are counted and thresholded separately for each STS-1 path terminated by the
system. A UAS is not counted as a SES.
Unavailable Seconds (UAS) 9
An STS-1 path is considered "unavailable" from the beginning of X consecutive
SES until the beginning of Y consecutive seconds, none of which is severely
errored. An X is equal to 10 seconds or, in the case of a failure, the STS-1 path
signal failure. A Y is equal to 10 seconds of no SES or STS path signal failure. If
there is an unprotected STS-1 path terminating equipment failure (3DS3 or OLIU),
UAS are counted from within 1 second of circuit pack failure to within 1 second of
circuit pack recovery.
DS3 Path Parameters 9
Performance Monitoring (PM) Enabling 9
Collection of DS3 path parameters are initiated only when a slot is equipped with
a 3DS3 circuit pack, the port is in the IS or NMON state, the DS3 port is
provisioned for VM or VMR mode, and an STS-1 cross-connection is present (see
Table 9-5). Parameters continue to be available in reports and generate
appropriate TCAs until the input signal to the DS3 interface is removed and the
update command or the UPD/INIT button is pressed (transitioning to the AUTO
state). Alternatively, the DS3 path parameter can be disabled by setting the DS3
path port to the CC mode using the set-t3 command. The PM mode parameter
should be set to "on" (default), using the set-t3 command to start PM data
monitoring and reporting.
To Next Page
Loading...
Need help?
General
