Verilink WANsuite 6x30 (34-00315.B) Product Manual - Manual (Page 105)

V T 1 0 0 I n t e r f a c e 4-7
Definitions of the timing sources are as follows:
Internal – The unit’s internal frequency standard (T1 1.544 Mbps ± 50 bps)
is used for all timing.
Network – Timing is derived from the Network port recovered clock.
Z ero S u p p ressio n 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
P R M E n a b le 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 sampled every second. The error types listed in the paragraphs below 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:
The table provides error status and alarm threshold information for the
following error parameters:
•
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 A read/write field that can be set to a desirable threshold.