Zhone 891630, Справочное руководство системы

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4-22 IMACS System Release 5.1.9 Reference Guide
Model No.
Running Head
Alarms System Configuration and Operation
4.7.3 Alarm Modifiers
Each alarm may also be designated as I=info , m=minor , M=major or C=crit . The filter
modifier appears on both the active alarm and alarm history screens.
If the system has an External Alarm card (optional), the occurrence of any alarm designated
as
crit will trigger a form-C relay contact on the External Alarm card. The relay contact action
sets off an annunciator or lamp at the equipment site. Similarly, the occurrence of any alarm
designated as
major triggers a different contact and activates another external indicator. Refer
to the Alarm Card Reference Guide for more information on the External Alarm cards.
4.7.4 Alarm Cutoff (ACO)
The ACO (Alarm Cutoff) security feature is used by the system to alert an operator to alarms
that clear themselves while the system is unattended. The ACO option settings are
aco-on and
aco-off . If ACO is set to report or log alarms, any alarm set to report or log with a major
modifier brings up an additional alarm message on the screen. You must manually clear this
message, which is the ACO alarm message (depends on whether or not CPU is set for latch or
CUR). The ACO is used with the node port of the Interface card. It can also trigger an external
alarm device, such as a bell or lamp, that must also be manually cleared.
ACO Alarm Cut-Off The ACO option forces you to manually clear certain alarms.
Without this option, self-correcting alarms might not be noticed.
When the ACO option is set to either Report or Log and the
modifier is set to Major, alarms will report normally but will also
generate an ACO alarm. If the modifier is set to Minor, it will not
generate the ACO alarm. If the filter is set to
I gnore, no alarms will
be generated. This can depend on whether or not CPU is set for
latch or CUR .
SYNC Clock Sync Alarm The SYNC alarm is generated when either the primary or secondary
external clock source is lost. This alarm is in addition to the
condition that lost the clock source (CGA-RED or OOS).
ERR-3 Excessive Error Rate
(10e-3) While using transcoder operations for E1 that involve downstream
tributaries, setting EER-3 to “report” will cause an alarm to appear
on the local system when E1 transmission errors exceed 10e-3 (1 in
1000). The local EER-3 alarm will identify the effected WAN link
(i.e., W1-1) and take it out of service. Simultaneously, the
downstream tributary will receive an AIS alarm to warn them of the
condition.
PLC_OOF DS3 PLCP Out of Framing Physical Layer Convergence Protocol is Out of Framing.
PLC_LOF DS3 PLCP Loss of Frame Physical Layer Convergence Protocol has Lost Framing.
PLC_YEL DS3 PLCL Yellow Alarm Physical Layer Convergence Protocol is reporting a Yellow Alarm.
BP_OOS Backplane Out of Service Indicates an internal corruption of a message that may be caused by
a variety of external or internal events. (See further description of
BP_OOS below.)