In the present paper, we have investigated the ultimate optical soliton transmission bit rate of 4800 channels with chromatic dispersion management in ultra-wide wavelength division multiplexing (UW-WDM) systems. Thermal effects are taken into account. Four effects are investigated, namely the soliton bit rate of the segment of negative chromatic dispersion, soliton bit rate of the segment of positive chromatic dispersion, soliton bit rate at the average controlling set of parameters, and finally, the average dispersion of the two segments as successive cells. The investigation is processed taking into account thermal, spectral, and static pressure dependences.Binary glass made of germania-doped-silica single-mode optical fiber is considered [SiOR 2R(1-x)+GeOR 2R(x)]. The nonlinear refractive index is considered as a function of the germania mole fraction (x). The management of total chromatic dispersion is done using two successive segments of fibers of equal or of different lengths and alternating ( positive-negative ) total chromatic dispersions. It is found that the transmitted soliton bit rate undergoes severe reduction due to the thermal variations. Also, the dispersion management possesses remarkable effects on that bit rates.