Features:
- provides 4E1/8E1/16E1 The G.703 connection
- realizes long-distance monitoring of this end equipment to the far-end equipment
- provides function of ordering 4E1/8E1/16E1 to loop return from the remote end, fiber self-loop at local end; and provides a group service telephone interface (to select)
- three power supplies: DC-48V, DC+24V or AC220V
- transmitting range: 2-120Km
- the double filament bidirectional and the single filament bidirectional type may select
- conforms to the telecommunication level operation
- requirement, and does not have the fault time equally (MTBF) above 100,000 hours
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