Specifications

3-16 Reference Guide
Model No.
Running Head
Alarms and Alarm Filters System Configuration and Operation
The last column sets the alarm cutoff (ACO) to
aco-off
or
aco-on
. These settings are explained
later in this chapter.
The filter in the third column takes precedence over its modifier. If, for instance, you have an
alarm filter set to
ignore
, the setting of the modifier as
info
,
minor
,
major,
or
crit
will be
ignored. Refer to system specifications section in this manual for alarms and their meanings.
Always set the alarm filters before activating any card ports!
Table 3-3. Alarm Filters
Filter Alarm Meaning
OOS Out of Service The card, power supply or ringing generator is faulty or has been removed from the
unit.
NOS No Signal Incoming WAN signal is lost.
LOS Loss of Synchronization Frame Alignment is lost.
YEL Yellow Alarm The system has received a Yellow Alarm signal from a remote device. Usually
received when the device loses WAN signal or synchronization.
AIS Alarm Information Signal The system has received a Blue Alarm signal from a remote device. Usually received
when the remote or intermediate device has a major failure.
CGA_RED Carrier Group Alarm - Red The local incoming WAN signal has a serious problem and trunk conditioning is
started. After receiving a RED alarm (NOS or LOS) for 2-3 seconds, the system
initiates the appropriate trunk conditioning sequence (see voice cards for information
about the TC_CGA setting) and sends a Yellow Alarm to the remote device. If the
system is in drop/insert mode, it also sends an AIS signal to the downstream
equipment.
CGA_YEL Carrier Group Alarm - Yellow The system has initiated trunk conditioning in response to a Yellow Alarm from a
remote device. After 2-3 seconds, the system initiates the appropriate trunk
conditioning sequence (see voice cards for information about the TC_CGA setting).
ERR Excessive Error Rate The error rate measured by the system has exceeded the threshold set on the WAN
card.
SENSOR Alarm Card Sensor The Alarm Card sensor has received an alarm indication from an attached device.
DCHAN D-chan out of service If the network side D channel looses contact with the user side, an alarm message
will be generated. The alarm message will show the slot # and D channel # where the
problem exists.
SWITCH Switch to redundant card The primary card has failed and the system has switched to the redundant card.
UCA User card/port alarm One or more active ports on a user card are not working properly. Voice ports will
show an alarm for excessive signaling transitions and data ports will show an alarm
for exceeding the data error threshold.
RESET System reset The system has been reset by either loss of power or by system software upgrade.
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.
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,
wetting 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 report a Yellow Alarm.