A.寬帶業(yè)務(wù)故障B.語音業(yè)務(wù)故障C.組播業(yè)務(wù)故障D.傳真業(yè)務(wù)故障
A.光纖的連通性測試B.衰減損耗測試C.收發(fā)功率測試D.反射損耗測試
A.立式機(jī)柜B.掛墻機(jī)柜C.開放式機(jī)柜D.標(biāo)準(zhǔn)機(jī)柜