7700 MultiFrame Manual
7707GPS-DR GPS Fiber Data Transceiver
Revision 1.1
7707GPS-DR-7
4.
CARD-EDGE MONITORING AND CONTROL
The 7707GPS-DR has seven LED status indicators and a 4-digit dot-matrix display on the front card-
edge to show operational status of the card at a glance. The card-edge pushbutton and toggle switch
are used to select various indications to the dot-matrix display and LED’s. Figure 4-1 shows the
locations of the indicators and pushbutton.
FRAME STATUS
ON/OFF
/ MODULE OK
LOCAL FAULT
LED 1
SERIAL
RUN/UPGRADE
SERIAL
LED 2
LED 3
LED 4
LED 5
LED 6
LED 7
Figure 4-1: Location of Status Indicators and Jumpers
4.1.
STATUS INDICATOR LEDS
LOCAL FAULT:
This red LED indicates poor module health. Three conditions could cause this
fault indication to be active: A link with a companion 7707GPS-DR has not been
achieved, operation of the output laser is erroneous, or if a card power fault
exists (i.e. a blown fuse). The LOCAL FAULT indication can also be reported to
the frame by setting the FRAME STATUS jumper.
MODULE OK:
This green LED indicates good module health. It will be on while a link is
maintained with a companion 7707GPS-DR, the output laser is operating
properly, and the card power is good.
LED1 – Red:
Distance
LED will light if the length of fiber between the cards is too long.
The cards must be connected by two fibers of equal length, with
each fiber being less than 2 km long.
LED2 – Green:
MSCA
LED will light when an MSC is connected to MSC port A.
LED3 – Green:
MSCB
LED will light when an MSC is connected to MSC port A.
