ZyXEL Communications OLT2406, User Manual

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Chapter 39 ONT Quick Setup
OLT2406 User’s Guide
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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
corrected
byte This displays the number of bytes that is corrected by Forward Error Correction (FEC).
TCA:FEC
corrected
code word This displays the number of codewords that is corrected by Forward Error Correction (FEC).
TCA:FEC
uncorrected
code word This displays the number of codewords that haven’t been corrected by Forward Error Correction
(FEC).
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
Prev/Next Click Prev or Next to show the previous/next screen if all status information cannot be seen in one
screen.
Table 144 Advanced Application > ONT Quick Setup > Alarm
LABEL DESCRIPTION