Verilink FrameStart FSM (34-00299.E) Product Manual - Manual (Page 82)

4-8 F r a m e S t a r t F S M
Network – Timing is derived from the Network port recovered clock.
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
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 screens present a
table that provides current error status and alarm threshold information.
Acceptable alarm thresholds are set for periods of 1-5, 10, 20, or 30 seconds
(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 not based on the TR 54016 or T1.403 interval
boundaries, but 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 columns of the status table are as follows:
• 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: Displays a read/write field that can be set to a desirable
threshold.
The table provides error status and alarm threshold information for the
following error parameters: