  We report the numerical calculations of the current-voltage characteristics
of intrinsic Josephson junctions in high- superconductors. The charging effect
at superconducting layers is taken into account. A set of equations is used to
study the non-linear dynamics of the system. In framework of capacitively
coupled Josephson junctions model we obtain the total number of branches using
fixed initial conditions for phases and their derivatives. The influence of the
coupling constant \alpha on the current-voltage characteristics at fixed
parameter \beta (\beta^2=1/\beta_c, where \beta_c is McCumber parameter) and
the influence of \alpha on \beta-dependence of the current-voltage
characteristics are investigated. We obtain the \alpha-dependence of the
branch's slopes and branch's endpoints. The obtained results show new features
of the coupling effect on the scheme of hysteresis jumps in current-voltage
characteristics of intrinsic Josephson junctions.
