Operator's Manual

Description of the Control Module CI Wireless Inc.
MirrorCell Select CDR812 Manual
6-16
Rev. X1
6.11.7.2 Minimum Alarm Repetition Time
This command has been introduced for the case where an alarm is toggling between OK
and ERROR. In this state, the repeater should not continuously call the OMC with the
new alarm detected for the same fault condition and potentially block the communication
between the repeater and the OMC. Typically the MAR should be set to a minimum of
two or three times the amount it takes for the repeater to dial up and report the alarm.
MAR is expressed in minutes, and the default value is 3.
Note that the first error will always be detected within the normal threshold time. Only the
repeated alarms will be blocked. If numerous alarms are received at the OMC, the
operator must be able to send a message to disable the particular alarm at the repeater
until service of the repeater can be performed.
For example, to set Minimum Alarm Repetition:
SET MAR 5 <enter>
This will set the alarm repetition time to 5 minutes.
Figure 3. Minimum Alarm Repetition time.
This figure shows how repetitive alarms are blocked by the MAR attribute.
An error is
detected
An end of error is
detected,
End alarm sent
away
New alarm from
the same source
A new alarm is
sent away. When
the MAR has
expired
Thresholdtime
Thresholdtime
Time
Minimum Alarm Repetition Time