Cov cuab yeej siv rov qab kev taw qhia multiplexing thev naus laus zis los ntim rau ntau E1 circuits kom xa cov ntaub ntawv Ethernet ntawm 4Channel 100BASE-TX.Nws tuaj yeem paub txog kev hloov pauv ntawm 1 ~ 8 channel E1 thiab Ethernet optical interface, ua rau E1 raws kev sib txuas nrog Ethernet optical interface.