Cisco D9477-1 Installation And Operation Manual page 91

LCD
Description
OUT (1-4)
FIFO overflow
OUT (1-4)
Packets
dropped.
See also ASI
(1-2) FIFO
overflow
78-717866-01 Rev D
Alarm
Probable Cause
Level
Minor A FIFO overflow occurred and packet
data has been lost indicating one or more
of the following conditions:
Too many sessions defined from the

DNCS for the MQAM
The data rate as defined from the

DNCS for the MQAM session is too
low, which also means that the data
rate of the ASI input to the MQAM is
too high
Hardware problem

Incorrect modulation mode

Minor Low-priority packets are being dropped.
The number of packets at the identified
RF output carrier exceeds its capacity.
This indicates one or more of the
following conditions:
Too many sessions defined from the

DNCS for the MQAM
The data rate as defined from the

DNCS for the MQAM session is too
low, which also means that the data
rate of the ASI input to the MQAM is
too high
Hardware problem

Incorrect modulation mode

Troubleshooting Alarm Messages
Check and Correct
Reduce the data rate of

input to the MQAM
by doing one of the
following:
– Reducing the
amount of
incoming data
– Reducing the
amount of data
added to the
stream
– Increasing the
MQAM modulator
mode
Verify and correct

session rate targets
and threshold values
Contact Cisco Services

Reduce the data rate of

input to the MQAM
by doing the
following:
– Reducing the
amount of
incoming data
– Reducing the
amount of data
added to the
stream
– Increasing the
MQAM
modulation mode
Verify and correct

session rate targets
and threshold values
Reduce the total

number of MPEG
programs by deleting
sessions
Use a TV to verify

program availability
Contact Cisco Services

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