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Managing System Alarms 171
DS1/E1 UNI Module Alarms
Table 28 describes the alarms specific to the DS1 UNI and E1 UNI modules.
ATM Forum required alarms are indicated by the notation ATM Forum (R-xxx),
where xxx is the required alarm number.
Table 28 DS1/E1 UNI Module Alarms
Alarm Meaning Troubleshooting Steps
AFA Link Removal Automatic Frequency
Adjustment - Link removed
from physical line group due to
error rate in CRC check of
T1/E1 exceeding user specified
rate for a given period of time.
Check the removed link for the CRC
errors.
Bad IMA ID A link within the group has
received an IMA ID from the far
end that is different than when
the group was initialized (and
from the other links in the
group). The link with the bad
IMA ID is probably
misconnected.
Check the links for proper connection.
Reconnect if necessary.
Bad Link ID Each IMA group assigns a
unique Transmit link ID to each
link in the group. This link ID
should match the Receive link
ID of the remote end IMA
device. This alarm means that a
link was operating correctly,
but then received a Transmit
link ID already assigned to a
previous link.
A Tx Misconnected alarm is
also generated.
Check the links for proper connection.
Reconnect if necessary.
Bad M The far end frame size M has
changed in an IMA link.
The maximum value for the
frame size on the local device’s
serial card must match the
maximum value for the frame
size of the connected device.
The link with the BAD M is
probably misconnected.
Check to make sure the maximum
frame size is set to the same value on
the local and remote ends.
Bad Offset Far end ICP cell offset has
changed in an IMA link.
Each IMA group assigns a
unique Transmit offset to each
link in the group. This alarm
means that a link was
operating correctly, but then
received a Transmit offset
already assigned to a previous
link.
A Tx Misconnected alarm is
also generated.
Check the links for proper connection.
Reconnect if necessary.
(continued)