... 120Ohm Single Fiber 20km 1550Tx/1310Rx 1 Fiber Port Card type Framed E1 Fiber Modem Card, Card Type PDH Multiplexer SPD-FE1-S ... Modem, Single fiber, 20km, 1550Tx/1310Rx wavelength, 1 fiber port, 120ohm, Card type.High Quality with FCC certificateCondition: Brand NewManufacturer: ... Modem, Single fiber, 20km, 1550Tx/1310Rx wavelength, 1 fiber port, 120ohm, Card type. We test each piece of FE1 fiber ...