T1/E1 Uni With Ima Module Alarms - 3Com SuperStack II PathBuilder S330 Reference Manual

170 C 5: P B
HAPTER ATH UILDER
S330 D P
IAGNOSTICS AND ERFORMANCE
Table 10 Alarms Common to Several Modules (continued)
Alarm Meaning
Network Line A loopback is configured on
Loopback the port. Loopbacks are for
troubleshooting only and
should not be present under
normal operating conditions.
Out of Frame(OOF) The configuration settings on
the port are not correct for the
line, or the port configuration
is correct, but the line is
experiencing errors that result
in an alarm.

T1/E1 UNI with IMA Module Alarms

Table 11 describes the alarms specific to the T1 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 11 T1/E1 UNI with IMA Module Alarms
Alarm Meaning
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.
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.
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.
(continued)
S
TATISTICS
Troubleshooting Steps
If you are not troubleshooting the port,
turn off the loopback.
Verify that the framing format
configured on the port matches the
framing format on the line. Check the
port's statistics report for evidence of a
bad line; bursts of LCVs could indicate
a timing problem. If connected to local
DS3/E3/OC3 equipment, check that
equipment's output level to make sure
it is not overdriving the input.
Troubleshooting Steps
Check the removed link for the CRC
errors.
Check the links for proper connection.
Reconnect if necessary.
Check the links for proper connection.
Reconnect if necessary.