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OPERATION
ALARM COUNTS
SCREEN
This function displays the count (number of recorded events) of each of the listed errors
that have been reported in the displayed time interval. The maximum count for any
alarm is 65535, unless otherwise stated. The information is updated when you begin this
function and when you press RETURN while this screen is displayed. The alarm counts
are divided into two groups: network and DTE (equipment) alarm counts, and are de-
scribed below. To use this function, press A. Figure 3-9 illustrates the ALARM COUNTS
screen.
When you use the PMC-100 to perform the Scan Network Elements func-tion, a 551 with
alarm conditions reports to the PMC-100 the number of Major and Minor Alarms but
does not report specific alarms. You must review the ALARM COUNTS screen to
determine which alarms exist. The following lists alarm conditions by type:
Minor Alarms
Network Received Yellow
DTE Excessive Zeros
DTE Low Average Density
One CRC-6 error event
and/or
One out of frame (OOF) state
3-14
NOTE
In Unframed Mode, the Network Out Of Frame,
Received Yellow, Alarm Indication, Failed Signal State,
Controlled Slips and CRC Error counters, as well as the
DTE Loss Of Sync counter, are removed from the
ALARM COUNTS screen (the entire bandwidth is used
for customer payload, so these framing alarms do not
apply).
One ESF error event
One severely errored second
One failed signal state
FIGURE 3-8. ERROR DESCRIPTION
Major Alarms
Network Alarm Indication
Network Failed Signal State
Network Loss Of Signal
Network Red Alarm (* network OOF)
DTE Loss Of Signal
One errored second (ES)
x320 in one second
x 10 in a row
One failed second (FS)
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