Specifications

A-8 Reference Guide
Model No.
Running Head
A.5 Alarm Filter Requirements
Table A-15. Alarm and Filter Descriptions
Filter Alarm Meaning
OOS Out of Service The card, power supply, or ringing generator is faulty, or it was removed from the system.
NOS No Signal Incoming WAN signal is lost.
LOS Loss of Frame 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 Indication Signal The system has received a Blue Alarm signal (all-ones) from a remote device. Usually
received when the remote or intermediate device has a major failure.
CGA_RED Carrier Group Alarm–Red The incoming WAN signal has a serious problem and CGA trunk conditioning is in
progress. 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–Yel low
The system has initiated trunk conditioning in response to a Yellow Alarm from a remote
device. After 2 to 3 seconds, the system initiates the appropriate CGA trunk conditioning
sequence for information about the TC_CGA setting on voice cards).
EER 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-channel 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 numbers 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 or port alarm One or more active ports on a user card are not working properly. Voice cards will show an
alarm for excessive signaling transitions, and data cards will show an alarm for exceeding
the data error threshold.
RESET System reset The system has been reset by either a loss of power or a system software upgrade.
ACO Alarm Cutoff 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 they 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 Ignore, 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).
EER-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 affected WAN
link (e.g., 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 Frame Physical Layer Convergence Protocol is Out of Frame.
PLC_LOF DS3 PLCP Loss of Frame Physical Layer Convergence Protocol has lost framing.
PLC_Yel DS3 PLCP Yellow alarm Physical Layer Convergence Protocol is reporting a yellow alarm.