Craft Interface
M40 Internet Router Hardware Guide
18
FPC LEDs and Offline Button
Each of the eight FPC slots in the router has two LEDs and an offline button located directly
below it on the craft interface, as shown in Figure 7. The green LED labeled
OK
and red LED
labeled
FAIL
indicate FPC status, as described in Table 5.
The offline button, labeled with the FPC slot number (for example,
4
), prepares the FPC for
removal from the router when pressed. Press and hold the button for about 5 seconds, until
the
FAIL
LED lights.
Table 5: States for FPC LEDs
Alarm Relay Contacts, LEDs, and Cutoff Button
The area labeled
ALARM
at the left side of the craft interface contains two alarm LEDs and
relay contacts, and the alarm cutoff button (see Figure 7). The circular LED, labeled
RED ALARM
, lights to indicate a critical condition that can result in a system shutdown. The
triangular LED, labeled
YELLOW ALARM
, lights to indicate a less severe condition that requires
monitoring or maintenance. Both LEDs can be lit simultaneously. The LCD on the craft
interface reports the cause of the alarm.
To the left of the LEDs are the corresponding relay contacts for connecting the router to
external alarm-reporting devices. A system condition that causes the red or yellow alarm LED
to light on the craft interface also activates the corresponding alarm relay contact. For
instructions for attaching a device to the alarm relay contacts, see “Connect to an External
Alarm-Reporting Device” on page 121.
To deactivate red and yellow alarms, press the button labeled
ALARM CUTOFF
, which is
located to the right of the alarm LEDs. Deactivating an alarm turns off both LEDs and
deactivates the device attached to the corresponding alarm relay contact. However, the LCD
continues to report the alarm message until you clear the condition that caused the alarm.
Label
Shape
Color
State
Description
OK
Green
On steadily
FPC is functioning normally.
Blinking
FPC is starting up.
FAIL
Red
On steadily
FPC has failed or is offline.
