363-206-305
Maintenance Description
9-32
Issue 3 June 2000
STS signal failure. If there is an unprotected STS-1 path terminating equipment
(OLIU) failure, unavailable seconds are counted from within 1 second of circuit
pack failure to within 1 second of circuit pack recovery.
VT1.5 Path Parameters
9
Performance Monitoring Enabling
9
VT1.5 monitoring is initiated when the associated VT1.5 or STS-1 cross-
connection is made to a DS1 or DS1PM circuit pack. Parameters continue to be
available in reports and generate appropriate threshold crossing alerts until the
VT1.5 or STS-1 cross-connection is deleted.
Errored Seconds (ES)
9
An "errored second" is a second that is not an "unavailable second" in which one
or more V5 parity violations or an AIS or LOP is detected. This parameter is
counted and thresholded independently for each VT1.5 path terminated by the
system.
Severely Errored Seconds (SES)
9
A "severely errored" second is a second that is not an "unavailable second" in
which four or more V5 violations or an AIS or LOP is detected. Severely errored
seconds are counted and thresholded separately for each VT1.5 path terminated
by the system.
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