Verilink FrameStart FSM (34-00299.E) Product Manual - Manual (Page 30)

3-6 F r a m e S t a r t F S M
Serial – Timing is derived from the Serial port recovered clock.
Zero Suppression Determines whether ones density insertion is activated after 15 zeros. This
parameter is ignored if the Coding parameter is set to “B8ZS.”
Values: Disable, Enable
Default: Disable
PRM Enable Lets you establish which performance messaging standard will be employed
to initiate Performance Report Message (PRM) functions. Setting this field to
“Enable” instructs the unit to use ANSI T1.403, which sends a PRM once
every second. Setting this field to “Disable” instructs the unit to use AT&T
TR54016, which provides performance reporting on request only.
Values: Disable, Enable
Default: Disable
Error Status and Alarm Thresholds Table
The unit can be programmed to generate an alarm condition based on a
specific level of performance degradation. The Network screen presents a
table that provides current error status and alarm threshold information.
Acceptable alarm thresholds are set for periods of 15 minutes (900 seconds)
and are sampled every second. The error types listed in the following
paragraphs can be preset to a value between 0 and 900 seconds. Setting a field
to “0” (zero) disables the alarm on that statistic. To effectively disable alarm
reporting, set all fields to “0” (zero).
The 15-minute time frame is a time window based on the accumulated counts
over the previous fifteen 1-minute intervals. In all cases, if the number of
actual network errored seconds in the previous 15 minutes reaches the preset
threshold for the specified error type, an alarm condition is declared.
The four sections of the status table are:
The Network Error Status table provides information on the following error
parameters:
ES Sets the Errored Seconds (ES) threshold. An ES is a 1-second period in which
at least one logic error occurred. The default value is 45 seconds.
SES Sets the Severely Errored Seconds (SES) threshold. An SES is a 1-second
period in which at least 320 CRC errors or one Out -of-Frame (OOF) error
occurred. The default value is 5 seconds.
• Status Displays the current status of the network port.
•
Alarm Displays the alarm value of the network port. The unit
declares an alarm as soon as the count exceeds the threshold
set.
•
Count Displays the number of events or occurrences of this statistic
that have been detected.
• Threshold Read/write field that can be set to a desirable threshold.