... power supply. FT-50S (3U)PCM fiber optical multiplexer with 220VAC/-48VDC dual power Main ... E/M, 4 wire E/M, telegraph, V.35, V.24/V.28, 64K, N×64K, Ethernet subchannel card. ... 4E1 PDH card: access 4 E1s Specifications * Optical Fiber Interface-Port number: 1-2, support redundant ... backup-Bit rate: 150Mbps+/-50ppm-Wavelength: 1310nm/1550nm-Optical power:>-9dBm- Sensitivity:<-38dBm (BER≤1*10-10 ...