... .supply order E1 opposite terminal loop back function ,optical home terminal self-loop function3.supply one channel order ... time exceed 10 thousands hours6.high reliability ,supply the types of 19 inch rack mounting ,desktop ,wall-hung ,and ... .three types of power supply mode : 220VAC,-48VDC,+24VDC8.transmission distance : 2~120Km9.networking management function of SNMPTechnical parameters Optical fiber ...