In this paper, we demonstrate the effect of soliton interaction in 100 Gbps telecommunication system implemented with four types of practically deployed telecom fibers like conventional single mode fiber, Alcatel’s teralight fiber, Lucent’s truewave plus fiber (TW+) and large effective area fiber. With the initial relative spacing of in-phase soliton chosen as q$$\,=\,$$=5.28, the characteristic soliton interaction point and the collision length with respect to various fiber types were studied. The practical undesirability of soliton interaction is noted for three collision period with all types of fibers to characterize the degradation after successive collisions. Besides studying the soliton interaction, we have also demonstrated its effect in telecommunication system degradation with the performance measures like Quality factor and eye patterns. Eye patterns were used to picture the mechanism of soliton interaction within the collision length. It was found system implemented with TW+ fiber of low dispersion co-efficient comparatively has long interaction length and suitable for long distance transmission without dispersion compensation. © 2014, Springer Science+Business Media New York.