User's Manual

Fault Name BIT Check Raise Fault/Failure Condition
Clear Fault/Failure
Condition
System ISVM ISDM GPS Operable SDU SCM
ISVM DPL
FAIL
ISVM Voice
Communication
Failure
The Iridium Satellite Voice Modem
(ISVM) failure will be raised if the
ISVM driver reports no communication
with the ISVM DPL port after three
retry attempts.
The “ISVM Voice
Communication Failure”
will be cleared if the ISVM
driver reports
communication with the
ISVM.
Yes FAIL OK
Voice communications not
available. Link should
reestablish within a few
minutes. If link does not
reestablish within 20 minute
period, replace SDU.
ISVM AT FAIL ISVM Data
Communication
Fil
The “ISVM Data Communication
Failure” will be raised if the Iridium All
Off M d i A i d h ISVM
The “ISVM Data
Communication Failure”
ill b l d if h ISVM
Non-Safety Services Data
Communications inoperable.
Li k h ld t bli h
Comment
L-3 Iridium SATCOM System - Built-in Test and Fault Indicators
INTERNAL CHECKS
Indicator Description
LED Off Fault/Event
Fault Light
Discrete Output
ON OFF
Operational,
No Failure/Fault
Critical Failure
Front Panel LEDs MCDU Indicators
Failure Off Mode is not Active and the ISVM
driver reports no communication with
the ISVM AT port after three retry
attempts.
will be cleared if the ISVM
driver reports
communication with the
ISVM AT port.
Yes FAIL OK
Li
n
k
s
h
ou
ld
rees
t
a
bli
s
h
within a few minutes. If link
does not reestablish within
20 minute period, replace
SDU.
ISDM FAIL ISDM
Communication
Failure
The Iridium Satellite Data Modem
(ISDM) failure will be raised if the
ISDM driver reports no communication
with the ISDM DPL port after three
retry attempts.
The “ISDM Voice
Communication Failure”
will be cleared if the ISDM
driver reports
communication with the
ISDM.
Yes FAIL OK
Safety Services Data
Communications inoperable.
Link should reestablish
within a few minutes. If link
does not reestablish within
20 minute period, replace
S
D
U
.
SIM CARD
FAIL
SIM
Communication
Failure
The “SIM Communication Failure” will
be raised if the system fails to read or
write to the SIM card.
The “SIM Communication
Failure” will be cleared if
the system successfully
reads and writes to the SIM
card.
Yes OK FAIL
Voice Communications not
available. Verify SIM card is
installed and SCM is
operational.
GPS FAIL GPS
Communication
Fail
The “GPS Communication Failure” will
b
e raised if the GPS Receiver reports no
communication with the GPS after three
retry attempts.
The “GPS Communication
Failure” will be cleared if
the GPS Receiver reports
communication with the
GPS.
Yes FAIL OK
GPS not available, Link
should reestablish within a
few minutes. If link does not
reestablish within 20 minute
period, replace SDU. If still
present verify Iridium/GPS
antenna and cable
an
t
enna an
d
ca
bl
e.
L‐3AviationRecordersProprietary