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User Reference and Installation Guide
6-2
© 2006 Microwave Data Systems Inc. All Rights Reserved.
MDS FOUR.9 Series
05-4561A01, Rev. A
Alarm
Affected
Component
Description
LED to
RED
Alarm
Code
Severity
RSL Low
Lower
Modem
RSSI is approaching the
minimum operational level of the
link as set during configuration.
Fault detection via modem
status polling, comparing RSSI
value to threshold value in
configuration table. Polling
interval 5 sec.
N/A
N/A
Major
Synthesizer
Unlock Lower
Modem
Modem synthesizer has
unlocked. Fault detection via
modem status polling. Polling is
done in conjunction with Modem
Unlock polling.
N/A
N/A
Critical
SNR Low
Lower
Modem
The signal-to-noise ratio is
below the minimum operational
level of the link as set during
configuration. Fault detection via
modem status polling,
comparing Eb/N0 value to
threshold value in configuration
table. Polling interval 5 sec.
N/A
N/A
Major
Modem Fault
Upper
Modem
The specified Modem card has
indicated a fault. Fault detection
is via reading Modem Hardware
Status from MODEM during
start-up and polling GPIO for
MODEM fault indication. Polling
interval 5 sec.
N/A
16
Critical
Modem
Comm.
Failure Upper
Modem
The Controller Card is unable to
communicate with the specified
Modem card.
Modem
Lower
17
Critical
Modem Card
Removed
Upper
Modem
The specified Modem card has
been removed from the IDU
(only if the specified Modem
card has been enabled for use).
Fault detection via card-detect
logic.
N/A
18
Major
Summary of Contents for FOUR.9 Series
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