OAN：Optical Access Network，光接入网
ODN：Optical Distribution Network，光分配网络。关联词：ODT
OLT：Optical Line Terminal，光纤线路终端。关联词：ONU
ONU：Optical Network Unit，光网络单元。关联词：OLT
ODT：Optical Remote Terminal，光远程终端。关联词：ODN
