3com S7906E Manuel De Montage

 

3-13 

Forward Error Correction (FEC) can implement downlink error correction on the OLT and uplink error 
correction on the ONU to lower the bit error rate and extend the optical transmission distance. The 
packets enabled with FEC carry error correction codes. Therefore, the actual uplink bandwidth of the 
ONU will be less than that configured.  

Follow these steps to enable FEC: 

Enter system view 

 

— 

Enter ONU port view 

 onu 

 

— 

Enable the FEC function 

Optional 
Disabled by default 

 

When an ONU attached to an OLT encounters configuration changes or failures or is being debugged, 
you can configure the ONU to report the specified types of information to the OLT.  

Note that: 

Because a large number of ONUs are attached to an OLT, enabling ONUs to report information to the 
OLT may generate a large amount of traffic and thus cause congestion. Therefore, you are 
recommended to select the reported information type as required. 

Follow these steps to configure an ONU to report information to the OLT: 

Enter system view 

— 

Enter ONU port view 

 onu 

 

— 

Configure the ONU to report 
the specified types of 
information to the OLT 

{ debug | log | 

} enable level severity 

Optional 
By default, an ONU reports no 
information to its OLT.  

 

Complete this task to configure the encryption of the downlink traffic transmitted from the OLT to ONUs, 
thereby protecting user information against illegal access.  

Follow these steps to configure traffic encryption: 

Enter system view 

 

— 

Enter ONU port view 

 onu 

 

—