Application Product characteristic (1) provides 4 E1/8E1/16E1 The G. 703 connection(namely provides 120/240/480 roadbeds groups telephone channel) (2) realizes long-distance monitoring of this end equipment to the far-end equipment (two-row indicating lamp, upper row indicates local status, lower row indicates far-end status ) (3) provides function of ordering 4 E1/8E1/16E1 to loop return the remote end, fiber self-loop at local end; and provides a group service telephone interface (optical) (4) three power suppliers: DC-48V, DC+24V or AC220V (optical) (5) transmitting range: 2-120Km three double fiber bidirectional and the single fiber bidirectional type may (7) conforms to the telecommunication level operation requirement, and does not have the fault time equally (MTBF) above 70000 hours (8) has the redundant reliability, provides installment of 19rack, desktop sets, the wall hanging, and card-inserting, at the same time 19rack has the alternating and direct power supply. (9) Dual fiber ports for option (10) Realizes the SNMP network management function. Optical interface Optical wavelength: 850nm/1310nm for multi-mode optical interface, 1310nm/1550nm for single-mode optic interface Optical interfaces/FC Receiving and dispatching module: >-6dBm Optical receiver receiving sensitivity<-36(BER<10): Dynamic range receiving: >-30Db Transmitting range: Multi-mode 2Km, single-mode 40Km, single-mode 60Km, single-mode 120Km Vibration characteristic: Satisfies G. 742 and the G. 823 standard E1 interface Interface code: HDB3 code Line speed: 2. 048Mbp/S Order information FM0-120: 4E1 Fiber Optical Mux FM0-240: 8E1 Fiber Optical Mux FM0-480: 16E1 Fiber Optical Mux FM0-120-ETH: 4E1+10/100M Fiber Optical Mux FM0-240-ETH: 8E1+10/100M Fiber Optical Mux FM0-480-ETH: 16E1+10/100M Fiber Optical Mux All models are single mode, single fiber and sold by pairs. When ordering please indicate the working distance.