... perfect RS232 communication interface,SNMP network management,1+1 back-up power supply,and casing temperature auto-control.all ... 1550EC optical transmitter can be installed in the front panel(the back panel is also available if needed.Features 1, High ... ,OMI can be optimized at spot.7, Optional1+1 back-up power supply. Technical parameters ItemsParameterRemarkOptic ParametersOperating wavelength(nm ...