OptiX OSN1800 TNF1CP6 is mainly used to map two channels of CPRI service signals into OTU2, at the same time, the board completes the reverse provess. The TNF2CP6 is mainly used to map two to six channels of CPRI/OBSAI service signals into one or two channels of OTU2 signals, at the same time, the board completes the reverse process.