7700 MultiFrame Manual
7707DT RS-232/422/485 Fiber Data Transceiver
Revision
1.8
Page - 13
4.
CARD-EDGE MONITORING AND CONTROL
The 7707DT has eight 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
LED 8
CARD ID
A/ B
(Single-fiber Versions)
LED 9
LED 10
LED 11
LED 12
LED 13
7707DT-GPIO
Only
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 7707DT 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 7707DT, the output laser is operating properly, and the card
power is good.
