Chapter 2 - Hardware Description and Installation
2-5
Active Alarms
To access the
Active Alarms,
select the first option from the
MGC-25 Main
menu.
If there are no active alarms, selecting the
Active Alarms
option shows the
System Idle
display.
To scroll vertically through the Active Alarms, press the
right (
) button to
highlight the scroll bar and then use the
up
/
down (
/
) buttons to scroll.
The possible alarms are described in Table 2-1:
Table 2-1: Alarms Shown in the LCD Display Window
Alarm Type
Description
System
Errors
Major/Minor Alarm
The system has an error. To view details about the error: in the
MGC Manager, right-click the
MCU
icon, and then click
Faults
.
For details about
Faults
, see the
MGC Administrator’s Guide,
Chapter 5
.
PRI Errors
R - Red Alarm
No connection is detected. There are no physical or higher layer
protocols established. The line cannot be used for service when
a red alarm is detected. Check the network cable.
Y
-
Yellow Alarm
The system is receiving a “Far End Alarm Failure.” This failure
indicates that layer 1 and layer 2 protocols have been
established but the layer 3 protocol is not yet established. The
line cannot be used for service when a yellow alarm is detected.
Check the network cable and contact your service provider.
N
-
Normal
D
-
D Channel
not established.
Check the network cable and contact your service provider.
LAN Errors
L - Link Down -
There is no signal from the network.
N - Normal
