Verilink WANsuite 5650 (34-00314.E) Product Manual - Manual (Page 41)

V T 1 0 0 I n t e r f a c e 3-19
C R C 4 M od e Used to disable or enable CRC-4 detection/generation towards the SHDSL
network. When less than 32 timeslots are configured on the G.703 port, CRC-
4 detection/generation is based on filling the unused timeslots with a fixed
pattern configurable via the management interface. This CRC-4 detection/
generation is also required for multirate (single or simultaneous services)
where less than 31 G.704 timeslots are carried over the SHDSL line.
Values: Disable, Enable
Default: Disable
F ram e Typ e Sets the type of framing used by the G.703 port.
Values: Framed, Unframed
Default: Framed
E B it G en eratio n In framed mode,this is used to configure the CRC-4 detection/generation via
the management interface.
Values: Disable, Enable
Default: Disable
R A I G en eratio n The RAI (Remote Alarm Indication) detection shall be in accordance with
ITU-T I.431 sec 3.4.1.2 and ITU-T G.704 Table 5A.
Values: Disable, Enable
Default: Enable
S a4 , S a 5, S a6 , S a 7, S a8 Displays the status of special spare bits found in Timeslot 0.
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 G.703 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).
The error types listed in the following paragraphs can be preset to a value
between 0 and 900 seconds. Setting a threshold field to “0” (zero) disables the
alarm on that statistic. To effectively disable alarm reporting, set all thresholds
to “0” (zero).
The 15-minute time frame is a time window based on the accumulated counts
over the previous 15 one-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.