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Table 144 Advanced Application > ONT Quick Setup > Alarm
LABEL
DESCRIPTION
SUFi
This displays the SUFi (Start-up Failure of ONUi) alarm status. The OLT will detect a SUFi alarm when
an ONT fails to initiate the ranging process for two consecutive times.
LOAi
This displays the LOAi (Loss of Acknowledge with ONUi) alarm status. The OLT will detect a LCDGi
alarm when it doesn't receive an acknowledgment for upstream traffic from an ONT.
DGi
This displays the DGi (Receive Dying-gasp of ONUi) alarm status. The OLT will detect a DGi alarm
when it receives a dying gasp message from on ONT. A dying message is generated when the
ONT loses power.
DFi
This displays the DFi (Deactivate Failure of ONUi) alarm status. The OLT will detect a DFi alarm
when an ONT doesn't react correctly after the OLT sends the messages in the parentheses for
three times (Deactivate_ONU-ID and Disable_Serial_Number).
DOWi
To avoid frequent updates on an equalization delay, two thresholds, the lower and upper
thresholds, are needed. The lower threshold sets a limit to the transmission deviation that is
allowed. A new equalization delay will be calculated when the old one exceeds the lower
threshold. When an equalization delay exceeds the upper threshold, it means an ONT doesn't
respond to the equalization delay correction commands. An ONT will be disabled when this
happens.
This displays the DOWi (Drift of Window of ONUi) alarm status. The OLT will detect a DOWi alarm
when the equalization delay of an ONT exceeds the lower threshold.
TIWi
To avoid frequent updates on an equalization delay, two thresholds, the lower and upper
thresholds, are needed. The lower threshold sets a limit to the transmission deviation that is
allowed. A new equalization delay will be calculated when the old one exceeds the lower
threshold. When an equalization delay exceeds the upper threshold, it means an ONT doesn't
respond to the equalization delay correction commands. An ONT will be disabled when this
happens.
This displays the TIWi (Transmission Interference Warning) alarm status. The OLT will detect a TIWi
alarm when the equalization delay of an ONT exceeds the upper threshold.
SFi
This displays the SFi (Signal Fail of ONUi) alarm status. The OLT will detect a SFi alarm when the
upstream BER (Bit Error Rate) of an ONT exceeds the default value.
SDi
This displays the SDi (Signal Degraded of ONUi) alarm status. The OLT will detect a SDi alarm when
the upstream BER (Bit Error Rate) of an ONT exceeds the default value.
LOKi
This displays the LOKi (Loss of Key Synch with ONUi) alarm status. The OLT will detect a LOKi alarm
when an ONT fails to respond to the key exchange initiated by the OLT for three consecutive
times.
ONT AID
This displays the ONT's ID in the format: ont-<pon>-<ont>.
TCA:FEC
This displays the number of bytes that is corrected by Forward Error Correction (FEC).
corrected
byte
TCA:FEC
This displays the number of codewords that is corrected by Forward Error Correction (FEC).
corrected
code word
TCA:FEC
This displays the number of codewords that haven't been corrected by Forward Error Correction
uncorrected
(FEC).
code word
TCA:BIP
This displays the number of the interleaved parity of the received bytes.
TCA:REI
This displays the number of BIP (bit interleaved parity) errors that are detected during the BER
interval.
Paging
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Click Prev or Next to show the previous/next screen if all status information cannot be seen in one
screen.
Chapter 39 ONT Quick Setup
OLT2406 User's Guide
322
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