Specifications

4-24
Reference Guide
Model No.
Running Head
Alarms System Configuration and Operation
Table 4-3. 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 loses 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 a 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. 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.)