Cover whole C-Band: carrie 40 or 80 chs Low noise figure:typical 5.0dB High flatness: typical 1dB Redundancy hot swap power module: 110/220VAC and 48VDC can plug Mix Provide upper computer software, query and set up optical amplifier equipment, use Ethernet network or serial port access. Perfect Network Interface:standard RJ45 industrial standard interface and SNMP.