pairgainhdsl设备,提供2线或4线的hdsl的联通，速率最高达到2M。(elu319/eru412/UTU-801/UTU-802/LTU-801/LTU-802/ltu804) pairgain eru-412 higain higain-e1 utu-701 utu－702 ltu-801 ltu-802 ltu-804 ntu-801 ntu-802 ere-811 adcutu802 adcutu801 adcutu702 adcutu804 adcltu802 adcltu801 adcltu804 adceru412 adcelu319 ltu-701 ltu-702 ltu-704 utu801 ntu801 ntu802 ntu804 utu802 utu702 ultu802 ltu804 eru412 pairgain801pairgain802 pairgain804pairgain701pairgain702pairgain412pairgain319 pairgain300sadc801adc802adc804 adc701adc702adc319adc300s