User Manual3. Remote ONU function configuration 30www.qtech.ruConfiguration Key Update interval (ms):OLT (config-gpon-olt1 / 4) # aes encryption key_exchange interval100003.9.2. Uplink packet GEM port service flow encryption enableEnable encryption:OLT (config-gpon-onu1 / 4: 1) # gemport 1 encryption enableEncryption disable:OLT (config-gpon-onu1 / 4: 1) # gemport 1 encryption disable3.10. Logical distance configuration and queryConfiguration:OLT (config-gpon-olt1 / 4) # onu max_distance20 onu range 0 ~ 20km40 onu range 20 ~ 40km60 onu range 40 ~ 60kmQuery:OLT (config) # show distance gpon-olt1 / 4 onu 13.11. Uplink and downlink FEC configurationDownstream enable:OLT (config-gpon-olt1 / 4) # fec downstream enableUpstream enable:OLT (config-gpon-onu1 / 4: 1) # fec upstream enableDescription:By default, the FEC state is not enabled.To enable this function, you need to use the C++ SFP module.3.12. ONU side MAC address filteringQTECH OLT supports remote service dynamic MAC address quantitative restrictions, or staticallyfixed MAC address restriction for remote ONUs.Configure the ONU remote service MAC address restriction mode (dynamic and static)