... ) Power supply option: AC220V, DC-48V. The positive and negative terminal can be exchanged for DC-48V, easy for installation and ... :Standalone, desktop, 19inch;Card,usually be inserted in our rack 19 inch. E1 interface: Interface Rate2.048Mb/s±50ppm CodingHDB3 Interface ... -mode, 40 Km/60Km/120Km for single mode. PDH optical terminal