  CMS potential for study of the s-channel $H^{\pm}$-boson production via light
quark annihilation is investigated for large values of $\tan\beta$ ($=20\div
50$) and relatively light charge Higgs boson ($M_H = 200 \div 400$ GeV). An
appropriate parameterisation for $M_{\top}(j, \ETM)$-distributions of the
signal and background events is proposed, which provides the determination of
the charged Higgs mass and $\tan\beta$ parameter.
